diff --git a/new_editor/CMakeLists.txt b/new_editor/CMakeLists.txt
index 83fd3903..8414f187 100644
--- a/new_editor/CMakeLists.txt
+++ b/new_editor/CMakeLists.txt
@@ -141,6 +141,7 @@ xcui_editor_apply_common_target_settings(XCUIEditorHost PUBLIC)
 target_link_libraries(XCUIEditorHost PUBLIC
     XCEngine
     d2d1.lib
+    d3d11.lib
     d3d12.lib
     d3dcompiler.lib
     dwrite.lib
diff --git a/new_editor/app/Application.cpp b/new_editor/app/Application.cpp
index 8be4f23a..aac5f746 100644
--- a/new_editor/app/Application.cpp
+++ b/new_editor/app/Application.cpp
@@ -36,6 +36,7 @@ constexpr const wchar_t* kWindowClassName = L"XCEditorShellHost";
 constexpr const wchar_t* kWindowTitle = L"Main Scene * - Main.xx - XCEngine Editor";
 constexpr UINT kDefaultDpi = 96u;
 constexpr float kBaseDpiScale = 96.0f;
+constexpr UINT kDeferredRenderMessage = WM_APP + 1u;
 
 bool ResolveVerboseRuntimeTraceEnabled() {
     wchar_t buffer[8] = {};
@@ -541,6 +542,8 @@ void Application::RenderFrame() {
         return;
     }
 
+    ApplyPendingWindowResize();
+
     RECT clientRect = {};
     GetClientRect(m_hwnd, &clientRect);
     const unsigned int pixelWidth =
@@ -607,7 +610,7 @@ void Application::RenderFrame() {
         ApplyHostedContentCaptureRequests();
         ApplyCurrentCursor();
         m_editorWorkspace.Append(drawList);
-        if (d3d12FrameBegun && !m_inInteractiveResize) {
+        if (d3d12FrameBegun) {
             m_editorWorkspace.RenderRequestedViewports(m_windowRenderer.GetRenderContext());
         }
     } else {
@@ -760,36 +763,51 @@ std::string Application::DescribeInputEvents(
 }
 
 void Application::OnResize() {
+    QueueCurrentClientResize();
+}
+
+void Application::OnEnterSizeMove() {
+    m_inInteractiveResize = true;
+}
+
+void Application::OnExitSizeMove() {
+    m_inInteractiveResize = false;
+    QueueCurrentClientResize();
+}
+
+void Application::QueueWindowResize(UINT width, UINT height) {
+    if (width == 0u || height == 0u) {
+        return;
+    }
+
+    m_pendingWindowResizeWidth = width;
+    m_pendingWindowResizeHeight = height;
+    m_hasPendingWindowResize = true;
+}
+
+void Application::QueueCurrentClientResize() {
     UINT width = 0u;
     UINT height = 0u;
     if (!QueryCurrentClientPixelSize(width, height)) {
         return;
     }
 
-    m_renderer.Resize(width, height);
-    CommitWindowResize();
-    if (m_inInteractiveResize) {
-        m_editorWorkspace.SetViewportSurfacePresentationEnabled(false);
+    QueueWindowResize(width, height);
+}
+
+bool Application::ApplyPendingWindowResize() {
+    if (!m_hasPendingWindowResize) {
+        return true;
     }
-}
 
-void Application::OnEnterSizeMove() {
-    m_inInteractiveResize = true;
-    m_editorWorkspace.SetViewportSurfacePresentationEnabled(false);
-}
-
-void Application::OnExitSizeMove() {
-    m_inInteractiveResize = false;
-    CommitWindowResize();
-}
-
-bool Application::CommitWindowResize() {
-    UINT width = 0u;
-    UINT height = 0u;
-    if (!QueryCurrentClientPixelSize(width, height)) {
+    const UINT width = m_pendingWindowResizeWidth;
+    const UINT height = m_pendingWindowResizeHeight;
+    m_hasPendingWindowResize = false;
+    if (width == 0u || height == 0u) {
         return false;
     }
 
+    m_renderer.Resize(width, height);
     m_renderer.DetachWindowRenderer();
     const bool resizedWindowRenderer =
         m_windowRenderer.Resize(static_cast<int>(width), static_cast<int>(height));
@@ -816,6 +834,15 @@ bool Application::CommitWindowResize() {
     return hasHealthyD3D12WindowInterop;
 }
 
+void Application::RequestDeferredRenderFrame() {
+    if (m_hwnd == nullptr || !IsWindow(m_hwnd) || m_renderFrameQueued) {
+        return;
+    }
+
+    m_renderFrameQueued = true;
+    PostMessageW(m_hwnd, kDeferredRenderMessage, 0, 0);
+}
+
 bool Application::QueryCurrentClientPixelSize(UINT& outWidth, UINT& outHeight) const {
     outWidth = 0u;
     outHeight = 0u;
@@ -844,16 +871,18 @@ void Application::OnDpiChanged(UINT dpi, const RECT& suggestedRect) {
     m_dpiScale = GetDpiScale();
     m_renderer.SetDpiScale(m_dpiScale);
     if (m_hwnd != nullptr) {
+        const LONG windowWidth = suggestedRect.right - suggestedRect.left;
+        const LONG windowHeight = suggestedRect.bottom - suggestedRect.top;
         SetWindowPos(
             m_hwnd,
             nullptr,
             suggestedRect.left,
             suggestedRect.top,
-            suggestedRect.right - suggestedRect.left,
-            suggestedRect.bottom - suggestedRect.top,
+            windowWidth,
+            windowHeight,
             SWP_NOZORDER | SWP_NOACTIVATE);
-        CommitWindowResize();
-        InvalidateRect(m_hwnd, nullptr, FALSE);
+        QueueCurrentClientResize();
+        RequestDeferredRenderFrame();
     }
 
     std::ostringstream trace = {};
@@ -1011,16 +1040,23 @@ LRESULT CALLBACK Application::WndProc(HWND hwnd, UINT message, WPARAM wParam, LP
     case WM_EXITSIZEMOVE:
         if (application != nullptr) {
             application->OnExitSizeMove();
-            application->RenderFrame();
+            application->RequestDeferredRenderFrame();
             return 0;
         }
         break;
     case WM_SIZE:
         if (application != nullptr && wParam != SIZE_MINIMIZED) {
             application->OnResize();
-            application->RenderFrame();
+            application->RequestDeferredRenderFrame();
         }
         return 0;
+    case kDeferredRenderMessage:
+        if (application != nullptr) {
+            application->m_renderFrameQueued = false;
+            application->RenderFrame();
+            return 0;
+        }
+        break;
     case WM_PAINT:
         if (application != nullptr) {
             PAINTSTRUCT paintStruct = {};
diff --git a/new_editor/app/Application.h b/new_editor/app/Application.h
index fe29a522..c5183079 100644
--- a/new_editor/app/Application.h
+++ b/new_editor/app/Application.h
@@ -37,8 +37,15 @@ private:
     bool Initialize(HINSTANCE hInstance, int nCmdShow);
     void Shutdown();
     void RenderFrame();
-    void OnResize(UINT width, UINT height);
+    void OnResize();
+    void OnEnterSizeMove();
+    void OnExitSizeMove();
     void OnDpiChanged(UINT dpi, const RECT& suggestedRect);
+    void QueueWindowResize(UINT width, UINT height);
+    void QueueCurrentClientResize();
+    bool ApplyPendingWindowResize();
+    void RequestDeferredRenderFrame();
+    bool QueryCurrentClientPixelSize(UINT& outWidth, UINT& outHeight) const;
     bool IsPointerInsideClientArea() const;
     bool ApplyCurrentCursor() const;
     LPCWSTR ResolveCurrentCursorResource() const;
@@ -64,6 +71,7 @@ private:
     void QueueWindowFocusEvent(::XCEngine::UI::UIInputEventType type);
     static std::filesystem::path ResolveRepoRootPath();
     static LONG WINAPI HandleUnhandledException(EXCEPTION_POINTERS* exceptionInfo);
+    static bool IsVerboseRuntimeTraceEnabled();
 
     HWND m_hwnd = nullptr;
     HINSTANCE m_hInstance = nullptr;
@@ -78,6 +86,11 @@ private:
     bool m_trackingMouseLeave = false;
     UINT m_windowDpi = 96u;
     float m_dpiScale = 1.0f;
+    bool m_inInteractiveResize = false;
+    bool m_renderFrameQueued = false;
+    bool m_hasPendingWindowResize = false;
+    UINT m_pendingWindowResizeWidth = 0u;
+    UINT m_pendingWindowResizeHeight = 0u;
 };
 
 int RunXCUIEditorApp(HINSTANCE hInstance, int nCmdShow);
diff --git a/new_editor/app/Host/D3D12WindowRenderer.h b/new_editor/app/Host/D3D12WindowRenderer.h
index 7ae7acba..666f4f81 100644
--- a/new_editor/app/Host/D3D12WindowRenderer.h
+++ b/new_editor/app/Host/D3D12WindowRenderer.h
@@ -22,7 +22,10 @@
 
 #include <d3d12.h>
 #include <windows.h>
+#include <wrl/client.h>
 
+#include <array>
+#include <string>
 #include <vector>
 
 namespace XCEngine::UI::Editor::Host {
@@ -34,13 +37,17 @@ public:
 
     bool Initialize(HWND hwnd, int width, int height);
     void Shutdown();
-    void Resize(int width, int height);
+    bool Resize(int width, int height);
     bool BeginFrame();
+    bool PreparePresentSurface();
     bool SubmitFrame(bool presentSwapChain);
+    bool SignalFrameCompletion();
+    bool PresentFrame();
 
     ID3D12Device* GetDevice() const;
     ID3D12DescriptorHeap* GetSrvHeap() const;
     ID3D12CommandQueue* GetCommandQueue() const;
+    const std::string& GetLastError() const;
     void AllocateShaderResourceDescriptor(
         D3D12_CPU_DESCRIPTOR_HANDLE* outCpuHandle,
         D3D12_GPU_DESCRIPTOR_HANDLE* outGpuHandle);
@@ -57,6 +64,9 @@ public:
     ::XCEngine::RHI::RHIDevice* GetRHIDevice() const;
     ::XCEngine::RHI::RHISwapChain* GetSwapChain() const;
     const ::XCEngine::Rendering::RenderSurface* GetCurrentRenderSurface() const;
+    const ::XCEngine::RHI::D3D12Texture* GetCurrentBackBufferTexture() const;
+    const ::XCEngine::RHI::D3D12Texture* GetBackBufferTexture(std::uint32_t index) const;
+    std::uint32_t GetBackBufferCount() const;
     ::XCEngine::Rendering::RenderContext GetRenderContext() const;
 
 private:
@@ -64,13 +74,18 @@ private:
     ::XCEngine::RHI::D3D12CommandQueue* GetD3D12CommandQueue() const;
     ::XCEngine::RHI::D3D12CommandList* GetD3D12CommandList() const;
     ::XCEngine::RHI::D3D12SwapChain* GetD3D12SwapChain() const;
+    ::XCEngine::RHI::RHICommandList* GetCurrentCommandList() const;
     void AllocateShaderResourceDescriptorInternal(
         D3D12_CPU_DESCRIPTOR_HANDLE* outCpuHandle,
         D3D12_GPU_DESCRIPTOR_HANDLE* outGpuHandle);
     void FreeShaderResourceDescriptorInternal(
         D3D12_CPU_DESCRIPTOR_HANDLE cpuHandle,
         D3D12_GPU_DESCRIPTOR_HANDLE gpuHandle);
+    bool InitializeFrameCompletionFence();
+    void ReleaseFrameCompletionFence();
+    void WaitForBackBufferFrame(std::uint32_t backBufferIndex);
     void WaitForGpuIdle();
+    void ReleaseBackBufferCommandReferences();
     void ReleaseBackBufferViews();
     bool RecreateBackBufferViews();
 
@@ -80,13 +95,19 @@ private:
 
     ::XCEngine::RHI::RHIDevice* m_device = nullptr;
     ::XCEngine::RHI::RHICommandQueue* m_commandQueue = nullptr;
-    ::XCEngine::RHI::RHICommandList* m_commandList = nullptr;
+    std::array<::XCEngine::RHI::RHICommandList*, kSwapChainBufferCount> m_commandLists = {};
     ::XCEngine::RHI::RHISwapChain* m_swapChain = nullptr;
     ::XCEngine::RHI::RHIDescriptorPool* m_srvPool = nullptr;
     ::XCEngine::RHI::D3D12DescriptorHeap* m_srvHeap = nullptr;
     std::vector<bool> m_srvUsage = {};
     std::vector<::XCEngine::RHI::RHIResourceView*> m_backBufferViews = {};
     std::vector<::XCEngine::Rendering::RenderSurface> m_backBufferSurfaces = {};
+    Microsoft::WRL::ComPtr<ID3D12Fence> m_frameCompletionFence = {};
+    HANDLE m_frameCompletionEvent = nullptr;
+    std::array<std::uint64_t, kSwapChainBufferCount> m_backBufferFenceValues = {};
+    std::uint32_t m_activeBackBufferIndex = 0u;
+    std::uint64_t m_lastSubmittedFrameValue = 0;
+    std::string m_lastError = {};
     UINT m_srvDescriptorSize = 0;
 };
 
diff --git a/new_editor/app/Host/NativeRenderer.h b/new_editor/app/Host/NativeRenderer.h
index 5c5a7970..0594d625 100644
--- a/new_editor/app/Host/NativeRenderer.h
+++ b/new_editor/app/Host/NativeRenderer.h
@@ -4,12 +4,17 @@
 #define NOMINMAX
 #endif
 
+#include "D3D12WindowRenderer.h"
+
 #include <XCEditor/Foundation/UIEditorTextMeasurement.h>
 
 #include <XCEngine/UI/DrawData.h>
 
-#include <d2d1.h>
+#include <d2d1_1.h>
+#include <d3d11_4.h>
+#include <d3d11on12.h>
 #include <dwrite.h>
+#include <dxgi1_2.h>
 #include <wincodec.h>
 #include <windows.h>
 #include <wrl/client.h>
@@ -30,7 +35,13 @@ public:
     void SetDpiScale(float dpiScale);
     float GetDpiScale() const;
     void Resize(UINT width, UINT height);
+    bool AttachWindowRenderer(D3D12WindowRenderer& windowRenderer);
+    void DetachWindowRenderer();
+    void ReleaseWindowRendererBackBufferTargets();
+    bool RebuildWindowRendererBackBufferTargets();
+    bool HasAttachedWindowRenderer() const;
     bool Render(const ::XCEngine::UI::UIDrawData& drawData);
+    bool RenderToWindowRenderer(const ::XCEngine::UI::UIDrawData& drawData);
     const std::string& GetLastRenderError() const;
     bool LoadTextureFromFile(
         const std::filesystem::path& path,
@@ -47,15 +58,6 @@ public:
         std::string& outError);
 
 private:
-    bool EnsureRenderTarget();
-    bool EnsureWicFactory(std::string& outError);
-    void DiscardRenderTarget();
-    bool CreateDeviceResources();
-    void InvalidateCachedTextureBitmaps(const ID2D1RenderTarget* renderTarget);
-    bool RenderToTarget(
-        ID2D1RenderTarget& renderTarget,
-        ID2D1SolidColorBrush& solidBrush,
-        const ::XCEngine::UI::UIDrawData& drawData);
     struct NativeTextureResource {
         std::vector<std::uint8_t> pixels = {};
         Microsoft::WRL::ComPtr<ID2D1Bitmap> cachedBitmap = {};
@@ -63,6 +65,30 @@ private:
         UINT width = 0u;
         UINT height = 0u;
     };
+    struct D3D12BackBufferInteropTarget {
+        Microsoft::WRL::ComPtr<ID3D11Resource> wrappedResource = {};
+        Microsoft::WRL::ComPtr<ID2D1Bitmap1> targetBitmap = {};
+    };
+    struct D3D12SourceTextureInteropResource {
+        std::uintptr_t key = 0u;
+        Microsoft::WRL::ComPtr<ID3D11Resource> wrappedResource = {};
+        Microsoft::WRL::ComPtr<ID2D1Bitmap1> bitmap = {};
+    };
+
+    bool EnsureRenderTarget();
+    bool EnsureWindowRendererInterop();
+    bool EnsureWicFactory(std::string& outError);
+    void DiscardRenderTarget();
+    bool CreateDeviceResources();
+    void ReleaseWindowRendererInterop();
+    bool RebuildBackBufferInteropTargets();
+    void ClearActiveInteropSourceTextures();
+    bool PrepareActiveInteropSourceTextures(const ::XCEngine::UI::UIDrawData& drawData);
+    void InvalidateCachedTextureBitmaps(const ID2D1RenderTarget* renderTarget);
+    bool RenderToTarget(
+        ID2D1RenderTarget& renderTarget,
+        ID2D1SolidColorBrush& solidBrush,
+        const ::XCEngine::UI::UIDrawData& drawData);
     bool DecodeTextureFile(
         const std::filesystem::path& path,
         NativeTextureResource& outTexture,
@@ -71,6 +97,9 @@ private:
         ID2D1RenderTarget& renderTarget,
         NativeTextureResource& texture,
         Microsoft::WRL::ComPtr<ID2D1Bitmap>& outBitmap);
+    bool ResolveInteropBitmap(
+        const ::XCEngine::UI::UITextureHandle& texture,
+        Microsoft::WRL::ComPtr<ID2D1Bitmap>& outBitmap) const;
     void RenderCommand(
         ID2D1RenderTarget& renderTarget,
         ID2D1SolidColorBrush& solidBrush,
@@ -82,11 +111,21 @@ private:
     static std::wstring Utf8ToWide(std::string_view text);
 
     HWND m_hwnd = nullptr;
-    Microsoft::WRL::ComPtr<ID2D1Factory> m_d2dFactory;
+    D3D12WindowRenderer* m_windowRenderer = nullptr;
+    Microsoft::WRL::ComPtr<ID2D1Factory1> m_d2dFactory;
     Microsoft::WRL::ComPtr<IDWriteFactory> m_dwriteFactory;
     Microsoft::WRL::ComPtr<IWICImagingFactory> m_wicFactory;
+    Microsoft::WRL::ComPtr<ID3D11Device> m_d3d11Device;
+    Microsoft::WRL::ComPtr<ID3D11DeviceContext> m_d3d11DeviceContext;
+    Microsoft::WRL::ComPtr<ID3D11On12Device> m_d3d11On12Device;
+    Microsoft::WRL::ComPtr<ID2D1Device> m_d2dDevice;
+    Microsoft::WRL::ComPtr<ID2D1DeviceContext> m_d2dDeviceContext;
     Microsoft::WRL::ComPtr<ID2D1HwndRenderTarget> m_renderTarget;
     Microsoft::WRL::ComPtr<ID2D1SolidColorBrush> m_solidBrush;
+    Microsoft::WRL::ComPtr<ID2D1SolidColorBrush> m_interopBrush;
+    std::vector<D3D12BackBufferInteropTarget> m_backBufferInteropTargets = {};
+    std::vector<D3D12SourceTextureInteropResource> m_activeInteropSourceTextures = {};
+    std::unordered_map<std::uintptr_t, Microsoft::WRL::ComPtr<ID2D1Bitmap1>> m_activeInteropBitmaps;
     mutable std::unordered_map<int, Microsoft::WRL::ComPtr<IDWriteTextFormat>> m_textFormats;
     std::unordered_set<NativeTextureResource*> m_liveTextures;
     std::string m_lastRenderError = {};
diff --git a/new_editor/app/Shell/ProductShellAsset.cpp b/new_editor/app/Shell/ProductShellAsset.cpp
index e8e08e1e..018ab0c5 100644
--- a/new_editor/app/Shell/ProductShellAsset.cpp
+++ b/new_editor/app/Shell/ProductShellAsset.cpp
@@ -429,11 +429,10 @@ UIEditorWorkspacePanelPresentationModel BuildViewportPresentation(
     presentation.panelId = std::move(panelId);
     presentation.kind = UIEditorPanelPresentationKind::ViewportShell;
     presentation.viewportShellModel.spec.chrome.title = std::move(title);
-    presentation.viewportShellModel.spec.chrome.subtitle = std::move(subtitle);
-    presentation.viewportShellModel.spec.chrome.showTopBar = true;
-    presentation.viewportShellModel.spec.chrome.showBottomBar = true;
-    presentation.viewportShellModel.frame.statusText =
-        "Viewport request chain is active.";
+    presentation.viewportShellModel.spec.chrome.subtitle = {};
+    presentation.viewportShellModel.spec.chrome.showTopBar = false;
+    presentation.viewportShellModel.spec.chrome.showBottomBar = false;
+    presentation.viewportShellModel.frame.statusText.clear();
     return presentation;
 }
 
@@ -448,8 +447,8 @@ UIEditorShellInteractionDefinition BuildBaseShellDefinition() {
     definition.statusSegments = {};
     definition.workspacePresentations = {
         BuildHostedContentPresentation("hierarchy"),
-        BuildViewportPresentation("scene", "Scene", "New Editor viewport shell"),
-        BuildViewportPresentation("game", "Game", "New Editor viewport shell"),
+        BuildViewportPresentation("scene", "Scene", {}),
+        BuildViewportPresentation("game", "Game", {}),
         BuildHostedContentPresentation("inspector"),
         BuildHostedContentPresentation("console"),
         BuildHostedContentPresentation("project")
diff --git a/new_editor/app/Viewport/ProductViewportHostService.cpp b/new_editor/app/Viewport/ProductViewportHostService.cpp
index 71019c71..e9bd29ac 100644
--- a/new_editor/app/Viewport/ProductViewportHostService.cpp
+++ b/new_editor/app/Viewport/ProductViewportHostService.cpp
@@ -8,24 +8,6 @@ namespace {
 
 using ::XCEngine::RHI::ResourceStates;
 
-std::string BuildViewportPendingStatus(ProductViewportKind kind) {
-    return kind == ProductViewportKind::Scene
-        ? "Scene viewport host pending D3D12 presenter integration."
-        : "Game viewport host pending D3D12 presenter integration.";
-}
-
-std::string BuildViewportReadyStatus(ProductViewportKind kind) {
-    return kind == ProductViewportKind::Scene
-        ? "Scene viewport render target ready; presenter still uses NativeRenderer."
-        : "Game viewport render target ready; presenter still uses NativeRenderer.";
-}
-
-std::string BuildViewportPresentedStatus(ProductViewportKind kind) {
-    return kind == ProductViewportKind::Scene
-        ? "Scene viewport frame ready."
-        : "Game viewport frame ready.";
-}
-
 } // namespace
 
 void ProductViewportHostService::AttachWindowRenderer(
@@ -81,23 +63,17 @@ ProductViewportFrame ProductViewportHostService::RequestViewport(
         : 0u;
 
     if (!entry.requestedThisFrame) {
-        entry.statusText = "Viewport is waiting for a visible surface.";
         return BuildFrame(entry, requestedSize);
     }
 
     if (m_windowRenderer == nullptr || m_device == nullptr) {
-        entry.statusText = BuildViewportPendingStatus(kind);
         return BuildFrame(entry, requestedSize);
     }
 
     if (!EnsureViewportResources(entry)) {
-        entry.statusText = "Failed to create viewport render targets.";
         return BuildFrame(entry, requestedSize);
     }
 
-    entry.statusText = m_surfacePresentationEnabled
-        ? BuildViewportPresentedStatus(kind)
-        : BuildViewportReadyStatus(kind);
     return BuildFrame(entry, requestedSize);
 }
 
@@ -119,9 +95,6 @@ void ProductViewportHostService::RenderRequestedViewports(
         }
 
         entry.renderedThisFrame = true;
-        entry.statusText = m_surfacePresentationEnabled
-            ? BuildViewportPresentedStatus(entry.kind)
-            : BuildViewportReadyStatus(entry.kind);
     }
 }
 
diff --git a/new_editor/app/Workspace/ProductEditorWorkspace.cpp b/new_editor/app/Workspace/ProductEditorWorkspace.cpp
index 670d16a4..e770e67d 100644
--- a/new_editor/app/Workspace/ProductEditorWorkspace.cpp
+++ b/new_editor/app/Workspace/ProductEditorWorkspace.cpp
@@ -36,33 +36,62 @@ void ApplyViewportFrameToPresentation(
     presentation.viewportShellModel.frame.statusText = viewportFrame.statusText;
 }
 
-std::vector<UIEditorWorkspacePanelPresentationModel> BuildWorkspacePresentations(
-    const UIEditorShellInteractionDefinition& definition,
-    const UIEditorShellInteractionRequest& shellRequest,
-    ProductViewportHostService& viewportHostService) {
-    std::vector<UIEditorWorkspacePanelPresentationModel> presentations =
-        definition.workspacePresentations;
-    for (UIEditorWorkspacePanelPresentationModel& presentation : presentations) {
-        if (presentation.kind != UIEditorPanelPresentationKind::ViewportShell ||
-            !IsProductViewportPanel(presentation.panelId)) {
-            continue;
-        }
+void ApplyViewportFrameToShellModel(
+    const ProductViewportFrame& viewportFrame,
+    UIEditorViewportShellModel& shellModel) {
+    shellModel.frame.texture = viewportFrame.texture;
+    shellModel.frame.requestedSize = viewportFrame.requestedSize;
+    shellModel.frame.presentedSize = viewportFrame.renderSize;
+    shellModel.frame.hasTexture = viewportFrame.hasTexture;
+    shellModel.frame.statusText = viewportFrame.statusText;
+}
 
-        const UIEditorWorkspaceViewportComposeRequest* viewportRequest =
-            FindUIEditorWorkspaceViewportPresentationRequest(
-                shellRequest.shellRequest.workspaceRequest,
-                presentation.panelId);
-        const ::XCEngine::UI::UISize requestedSize =
-            viewportRequest != nullptr
-                ? viewportRequest->viewportShellRequest.requestedViewportSize
-                : ::XCEngine::UI::UISize();
-        ApplyViewportFrameToPresentation(
-            viewportHostService.RequestViewport(
-                ResolveProductViewportKind(presentation.panelId),
-                requestedSize),
-            presentation);
+UIEditorWorkspacePanelPresentationModel* FindMutableWorkspacePresentation(
+    std::vector<UIEditorWorkspacePanelPresentationModel>& presentations,
+    std::string_view panelId) {
+    for (UIEditorWorkspacePanelPresentationModel& presentation : presentations) {
+        if (presentation.panelId == panelId) {
+            return &presentation;
+        }
     }
-    return presentations;
+
+    return nullptr;
+}
+
+void ApplyViewportFramesToShellFrame(
+    UIEditorShellInteractionFrame& shellFrame,
+    ProductViewportHostService& viewportHostService) {
+    auto applyToViewportFrames =
+        [&](std::vector<UIEditorWorkspaceViewportComposeFrame>& viewportFrames) {
+            for (UIEditorWorkspaceViewportComposeFrame& viewportComposeFrame : viewportFrames) {
+                if (!IsProductViewportPanel(viewportComposeFrame.panelId)) {
+                    continue;
+                }
+
+                const ProductViewportFrame viewportFrame =
+                    viewportHostService.RequestViewport(
+                        ResolveProductViewportKind(viewportComposeFrame.panelId),
+                        viewportComposeFrame.viewportShellFrame.requestedViewportSize);
+                ApplyViewportFrameToShellModel(
+                    viewportFrame,
+                    viewportComposeFrame.viewportShellModel);
+                if (UIEditorWorkspacePanelPresentationModel* presentation =
+                        FindMutableWorkspacePresentation(
+                            shellFrame.model.workspacePresentations,
+                            viewportComposeFrame.panelId);
+                    presentation != nullptr) {
+                    ApplyViewportFrameToPresentation(viewportFrame, *presentation);
+                }
+            }
+        };
+
+    applyToViewportFrames(shellFrame.workspaceInteractionFrame.composeFrame.viewportFrames);
+    applyToViewportFrames(shellFrame.shellFrame.workspaceFrame.viewportFrames);
+}
+
+std::vector<UIEditorWorkspacePanelPresentationModel> BuildWorkspacePresentations(
+    const UIEditorShellInteractionDefinition& definition) {
+    return definition.workspacePresentations;
 }
 
 UIEditorShellComposeModel BuildShellComposeModelFromFrame(
@@ -168,18 +197,7 @@ void ProductEditorWorkspace::Update(
     UIEditorShellInteractionDefinition definition =
         context.BuildShellDefinition(captureText);
     m_viewportHostService.BeginFrame();
-    const UIEditorShellInteractionRequest shellRequest =
-        ResolveUIEditorShellInteractionRequest(
-            bounds,
-            context.GetWorkspaceController(),
-            definition,
-            m_shellInteractionState,
-            metrics,
-            context.GetShellServices());
-    definition.workspacePresentations = BuildWorkspacePresentations(
-        definition,
-        shellRequest,
-        m_viewportHostService);
+    definition.workspacePresentations = BuildWorkspacePresentations(definition);
     const std::vector<UIInputEvent> hostedContentEvents = inputEvents;
     const std::vector<UIInputEvent> shellEvents =
         HasHostedContentCapture()
@@ -194,6 +212,7 @@ void ProductEditorWorkspace::Update(
         shellEvents,
         context.GetShellServices(),
         metrics);
+    ApplyViewportFramesToShellFrame(m_shellFrame, m_viewportHostService);
     context.SyncSessionFromWorkspace();
     context.UpdateStatusFromShellResult(m_shellFrame.result);
 
diff --git a/new_editor/include/XCEditor/Foundation/UIEditorRuntimeTrace.h b/new_editor/include/XCEditor/Foundation/UIEditorRuntimeTrace.h
index 1839db21..b2832c88 100644
--- a/new_editor/include/XCEditor/Foundation/UIEditorRuntimeTrace.h
+++ b/new_editor/include/XCEditor/Foundation/UIEditorRuntimeTrace.h
@@ -19,5 +19,6 @@ void AppendUIEditorCrashTrace(
 
 std::filesystem::path GetUIEditorRuntimeTracePath();
 std::filesystem::path GetUIEditorCrashTracePath();
+bool IsUIEditorRuntimeTraceInitialized();
 
 } // namespace XCEngine::UI::Editor
diff --git a/new_editor/src/Foundation/UIEditorRuntimeTrace.cpp b/new_editor/src/Foundation/UIEditorRuntimeTrace.cpp
index 630e7182..42ff5a59 100644
--- a/new_editor/src/Foundation/UIEditorRuntimeTrace.cpp
+++ b/new_editor/src/Foundation/UIEditorRuntimeTrace.cpp
@@ -17,6 +17,8 @@ std::mutex g_traceMutex = {};
 std::filesystem::path g_logRoot = {};
 std::filesystem::path g_runtimeTracePath = {};
 std::filesystem::path g_crashTracePath = {};
+std::ofstream g_runtimeTraceStream = {};
+std::ofstream g_crashTraceStream = {};
 bool g_traceInitialized = false;
 
 std::string BuildTimestampString() {
@@ -40,16 +42,9 @@ std::string BuildTimestampString() {
 }
 
 void AppendTraceLine(
-    const std::filesystem::path& path,
+    std::ofstream& stream,
     std::string_view channel,
     std::string_view message) {
-    if (path.empty()) {
-        return;
-    }
-
-    std::error_code errorCode = {};
-    std::filesystem::create_directories(path.parent_path(), errorCode);
-    std::ofstream stream(path, std::ios::out | std::ios::app);
     if (!stream.is_open()) {
         return;
     }
@@ -70,11 +65,20 @@ void InitializeUIEditorRuntimeTrace(const std::filesystem::path& logRoot) {
     g_logRoot = logRoot.lexically_normal();
     g_runtimeTracePath = (g_logRoot / "runtime.log").lexically_normal();
     g_crashTracePath = (g_logRoot / "crash.log").lexically_normal();
-    g_traceInitialized = true;
 
     std::error_code errorCode = {};
     std::filesystem::create_directories(g_logRoot, errorCode);
-    AppendTraceLine(g_runtimeTracePath, "trace", "trace session started");
+    g_runtimeTraceStream.close();
+    g_crashTraceStream.close();
+    g_runtimeTraceStream.open(g_runtimeTracePath, std::ios::out | std::ios::app);
+    g_crashTraceStream.open(g_crashTracePath, std::ios::out | std::ios::app);
+    g_traceInitialized = g_runtimeTraceStream.is_open() && g_crashTraceStream.is_open();
+    if (!g_traceInitialized) {
+        return;
+    }
+
+    AppendTraceLine(g_runtimeTraceStream, "trace", "trace session started");
+    g_runtimeTraceStream.flush();
 }
 
 void ShutdownUIEditorRuntimeTrace() {
@@ -83,7 +87,11 @@ void ShutdownUIEditorRuntimeTrace() {
         return;
     }
 
-    AppendTraceLine(g_runtimeTracePath, "trace", "trace session ended");
+    AppendTraceLine(g_runtimeTraceStream, "trace", "trace session ended");
+    g_runtimeTraceStream.flush();
+    g_crashTraceStream.flush();
+    g_runtimeTraceStream.close();
+    g_crashTraceStream.close();
     g_traceInitialized = false;
 }
 
@@ -95,7 +103,7 @@ void AppendUIEditorRuntimeTrace(
         return;
     }
 
-    AppendTraceLine(g_runtimeTracePath, channel, message);
+    AppendTraceLine(g_runtimeTraceStream, channel, message);
 }
 
 void AppendUIEditorCrashTrace(
@@ -113,8 +121,10 @@ void AppendUIEditorCrashTrace(
         "Unhandled exception code=0x%08X address=%p",
         exceptionCode,
         exceptionAddress);
-    AppendTraceLine(g_crashTracePath, "crash", buffer);
-    AppendTraceLine(g_runtimeTracePath, "crash", buffer);
+    AppendTraceLine(g_crashTraceStream, "crash", buffer);
+    AppendTraceLine(g_runtimeTraceStream, "crash", buffer);
+    g_crashTraceStream.flush();
+    g_runtimeTraceStream.flush();
 }
 
 std::filesystem::path GetUIEditorRuntimeTracePath() {
@@ -127,4 +137,9 @@ std::filesystem::path GetUIEditorCrashTracePath() {
     return g_crashTracePath;
 }
 
+bool IsUIEditorRuntimeTraceInitialized() {
+    std::lock_guard lock(g_traceMutex);
+    return g_traceInitialized;
+}
+
 } // namespace XCEngine::UI::Editor
diff --git a/new_editor/src/Shell/UIEditorViewportSlot.cpp b/new_editor/src/Shell/UIEditorViewportSlot.cpp
index 78d7e5d0..5f0b9ec9 100644
--- a/new_editor/src/Shell/UIEditorViewportSlot.cpp
+++ b/new_editor/src/Shell/UIEditorViewportSlot.cpp
@@ -55,34 +55,6 @@ UISize ResolveFrameAspectSize(const UIEditorViewportSlotFrame& frame, const UISi
     return fallback;
 }
 
-UIRect FitRectToAspect(const UIRect& container, const UISize& size) {
-    if (!HasArea(container) || size.width <= 0.0f || size.height <= 0.0f) {
-        return container;
-    }
-
-    const float containerAspect = container.width / container.height;
-    const float frameAspect = size.width / size.height;
-    if (frameAspect <= 0.0f) {
-        return container;
-    }
-
-    if (frameAspect >= containerAspect) {
-        const float fittedHeight = container.width / frameAspect;
-        return UIRect(
-            container.x,
-            container.y + (container.height - fittedHeight) * 0.5f,
-            container.width,
-            fittedHeight);
-    }
-
-    const float fittedWidth = container.height * frameAspect;
-    return UIRect(
-        container.x + (container.width - fittedWidth) * 0.5f,
-        container.y,
-        fittedWidth,
-        container.height);
-}
-
 UIColor ResolveToolFillColor(
     const UIEditorViewportSlotToolItem& item,
     bool hovered,
@@ -199,11 +171,7 @@ UIEditorViewportSlotLayout BuildUIEditorViewportSlotLayout(
     layout.inputRect = InsetRect(layout.surfaceRect, metrics.surfaceInset);
     layout.requestedSurfaceSize =
         UISize(layout.inputRect.width, layout.inputRect.height);
-    layout.textureRect = frame.hasTexture
-        ? FitRectToAspect(
-            layout.inputRect,
-            ResolveFrameAspectSize(frame, layout.requestedSurfaceSize))
-        : layout.inputRect;
+    layout.textureRect = layout.inputRect;
 
     if (!layout.hasTopBar) {
         return layout;
@@ -437,34 +405,8 @@ void AppendUIEditorViewportSlotForeground(
         }
     }
 
-    const UISize frameSize = ResolveFrameAspectSize(frame, layout.requestedSurfaceSize);
     if (frame.hasTexture && frame.texture.IsValid()) {
         drawList.AddImage(layout.textureRect, frame.texture, palette.imageTint);
-        drawList.AddText(
-            UIPoint(layout.inputRect.x + 14.0f, layout.inputRect.y + 14.0f),
-            "Texture " +
-                std::to_string(static_cast<int>(frameSize.width)) +
-                "x" +
-                std::to_string(static_cast<int>(frameSize.height)),
-            palette.textMuted,
-            12.0f);
-    } else {
-        const std::string statusText = frame.statusText.empty()
-            ? std::string("Viewport is waiting for frame")
-            : frame.statusText;
-        drawList.AddText(
-            UIPoint(layout.inputRect.x + 16.0f, layout.inputRect.y + 18.0f),
-            statusText,
-            palette.textPrimary,
-            14.0f);
-        drawList.AddText(
-            UIPoint(layout.inputRect.x + 16.0f, layout.inputRect.y + 42.0f),
-            "Requested surface: " +
-                std::to_string(static_cast<int>(layout.requestedSurfaceSize.width)) +
-                "x" +
-                std::to_string(static_cast<int>(layout.requestedSurfaceSize.height)),
-            palette.textMuted,
-            12.0f);
     }
 
     if (layout.hasBottomBar) {