diff --git a/Source/3rdParty/rt64/CMakeLists.txt b/Source/3rdParty/rt64/CMakeLists.txt
index c29634452..e7e362d9f 100644
--- a/Source/3rdParty/rt64/CMakeLists.txt
+++ b/Source/3rdParty/rt64/CMakeLists.txt
@@ -352,6 +352,16 @@ if (RT64_BUILD_PLUGIN)
         "${PROJECT_SOURCE_DIR}/src/api/rt64_api_common.cpp"
         "${PROJECT_SOURCE_DIR}/src/api/rt64_api_plugin.cpp"
     )
+    if (WIN32)
+        target_sources(rt64 PRIVATE
+            "${PROJECT_SOURCE_DIR}/src/contrib/imgui/backends/imgui_impl_win32.cpp"
+        )
+        target_link_libraries(rt64
+            delayimp.lib
+            Shcore.lib
+            Dwmapi.lib
+        )
+    endif()
 endif(RT64_BUILD_PLUGIN)
 
 target_link_directories(rt64 PRIVATE ${PROJECT_SOURCE_DIR}/src/contrib/dxc)
diff --git a/Source/3rdParty/rt64/examples/rhi_test.cpp b/Source/3rdParty/rt64/examples/rhi_test.cpp
index 3a8ea591d..9cd8a4435 100644
--- a/Source/3rdParty/rt64/examples/rhi_test.cpp
+++ b/Source/3rdParty/rt64/examples/rhi_test.cpp
@@ -8,7 +8,7 @@ namespace RT64 {
 int main(int argc, char** argv) {
     std::unique_ptr<RT64::RenderInterface> renderInterface = RT64::CreateVulkanInterface();
 
-#ifdef _WIN32
+#if defined(_WIN32)
     // Windows only: Can also use D3D12.
     const bool useVulkan = true;
     if (!useVulkan) {
diff --git a/Source/3rdParty/rt64/src/gui/rt64_inspector.cpp b/Source/3rdParty/rt64/src/gui/rt64_inspector.cpp
index bbd29d65e..cadfe00a9 100644
--- a/Source/3rdParty/rt64/src/gui/rt64_inspector.cpp
+++ b/Source/3rdParty/rt64/src/gui/rt64_inspector.cpp
@@ -80,7 +80,7 @@ namespace RT64 {
 
         switch (graphicsAPI) {
         case UserConfiguration::GraphicsAPI::D3D12: {
-#       ifdef _WIN32
+#       ifdef _WIN32 && !defined(RT64_BUILD_PLUGIN)
             D3D12Device *interfaceDevice = static_cast<D3D12Device *>(device);
             RenderDescriptorRange descriptorRange(RenderDescriptorRangeType::TEXTURE, 0, 1);
             descriptorSet = interfaceDevice->createDescriptorSet(RenderDescriptorSetDesc(&descriptorRange, 1));
@@ -136,7 +136,7 @@ namespace RT64 {
     Inspector::~Inspector() {
         switch (graphicsAPI) {
         case UserConfiguration::GraphicsAPI::D3D12: {
-#       ifdef _WIN32
+#       if defined(_WIN32) && !defined(RT64_BUILD_PLUGIN)
             ImGui_ImplDX12_Shutdown();
 #       else
             assert(false && "Unsupported Graphics API.");
@@ -182,7 +182,7 @@ namespace RT64 {
 
         switch (graphicsAPI) {
         case UserConfiguration::GraphicsAPI::D3D12: {
-#       ifdef _WIN32
+#       if defined(_WIN32) && !defined(RT64_BUILD_PLUGIN)
             ImGui_ImplDX12_NewFrame();
 #       else
             assert(false && "Unsupported Graphics API.");
@@ -214,7 +214,7 @@ namespace RT64 {
         if (drawData != nullptr) {
             switch (graphicsAPI) {
             case UserConfiguration::GraphicsAPI::D3D12: {
-#       ifdef _WIN32
+#       if defined(_WIN32) && !defined(RT64_BUILD_PLUGIN)
                 D3D12CommandList *interfaceCommandList = static_cast<D3D12CommandList *>(commandList);
                 interfaceCommandList->checkDescriptorHeaps();
                 ImGui_ImplDX12_RenderDrawData(drawData, interfaceCommandList->d3d);
diff --git a/Source/3rdParty/rt64/src/hle/rt64_application.cpp b/Source/3rdParty/rt64/src/hle/rt64_application.cpp
index d157faf78..1f0ac00dc 100644
--- a/Source/3rdParty/rt64/src/hle/rt64_application.cpp
+++ b/Source/3rdParty/rt64/src/hle/rt64_application.cpp
@@ -119,7 +119,7 @@ namespace RT64 {
         // Create a render interface with the preferred backend.
         switch (userConfig.graphicsAPI) {
         case UserConfiguration::GraphicsAPI::D3D12:
-#       ifdef _WIN64
+#       if defined(_WIN64) && !defined(RT64_BUILD_PLUGIN)
             renderInterface = CreateD3D12Interface();
             break;
 #       else
diff --git a/Source/3rdParty/rt64/src/render/rt64_raster_shader.cpp b/Source/3rdParty/rt64/src/render/rt64_raster_shader.cpp
index 3040655b2..63ee92edd 100644
--- a/Source/3rdParty/rt64/src/render/rt64_raster_shader.cpp
+++ b/Source/3rdParty/rt64/src/render/rt64_raster_shader.cpp
@@ -116,7 +116,7 @@ namespace RT64 {
             specConstants.emplace_back(4, desc.flags.value);
         }
         else {
-#       if defined(_WIN32)
+#       if defined(_WIN32) && !defined(RT64_BUILD_PLUGIN) // TODO.....
             if (useBytes) {
                 vertexShader = device->createShader(vsBytes->data(), vsBytes->size(), "VSMain", shaderFormat);
                 pixelShader = device->createShader(psBytes->data(), psBytes->size(), "PSMain", shaderFormat);
@@ -378,7 +378,7 @@ namespace RT64 {
         uint32_t PSBlobSize = 0;
         const bool useMSAA = (multisampling.sampleCount > 1);
         switch (shaderFormat) {
-#   ifdef _WIN32
+#   if defined(_WIN32) && !defined(RT64_BUILD_PLUGIN)
         case RenderShaderFormat::DXIL:
             VSBlob = RasterVSDynamicBlobDXIL;
             PSBlob = useMSAA ? RasterPSDynamicMSBlobDXIL : RasterPSDynamicBlobDXIL;