diff --git a/src/Common/Game/IW3/IW3_Assets.h b/src/Common/Game/IW3/IW3_Assets.h
index 6415e918..d654aecb 100644
--- a/src/Common/Game/IW3/IW3_Assets.h
+++ b/src/Common/Game/IW3/IW3_Assets.h
@@ -1240,7 +1240,7 @@ namespace IW3
 
     struct MaterialVertexDeclaration
     {
-        char streamCount;
+        unsigned char streamCount;
         bool hasOptionalSource;
         bool isLoaded;
         MaterialVertexStreamRouting routing;
diff --git a/src/ObjCommon/Game/IW3/Techset/TechsetConstantsIW3.h b/src/ObjCommon/Game/IW3/Techset/TechsetConstantsIW3.h
index 9916f91c..7a7bdb2a 100644
--- a/src/ObjCommon/Game/IW3/Techset/TechsetConstantsIW3.h
+++ b/src/ObjCommon/Game/IW3/Techset/TechsetConstantsIW3.h
@@ -738,11 +738,13 @@ namespace IW3
          .value = TEXTURE_SRC_CODE_RESOLVED_POST_SUN,
          .accessor = "resolvedPostSun",
          .updateFrequency = techset::CommonCodeSourceUpdateFrequency::RARELY,
+         .techFlags = MTL_TECHFLAG_NEEDS_RESOLVED_POST_SUN,
          },
         {
          .value = TEXTURE_SRC_CODE_RESOLVED_SCENE,
          .accessor = "resolvedScene",
          .updateFrequency = techset::CommonCodeSourceUpdateFrequency::RARELY,
+         .techFlags = MTL_TECHFLAG_NEEDS_RESOLVED_SCENE,
          },
         {
          .value = TEXTURE_SRC_CODE_POST_EFFECT_0,
diff --git a/src/ObjCompiling/Game/IW3/ObjCompilerIW3.cpp b/src/ObjCompiling/Game/IW3/ObjCompilerIW3.cpp
index 29ea2ee1..ad084e43 100644
--- a/src/ObjCompiling/Game/IW3/ObjCompilerIW3.cpp
+++ b/src/ObjCompiling/Game/IW3/ObjCompilerIW3.cpp
@@ -1,6 +1,9 @@
 #include "ObjCompilerIW3.h"
 
 #include "Game/IW3/IW3.h"
+#include "Game/IW3/Techset/TechniqueCompilerIW3.h"
+#include "Game/IW3/Techset/TechsetCompilerIW3.h"
+#include "Game/IW3/Techset/VertexDeclCompilerIW3.h"
 #include "Image/ImageIwdPostProcessor.h"
 
 #include <memory>
@@ -13,7 +16,10 @@ namespace
     {
         auto& memory = zone.Memory();
 
-        // No compilers yet
+        collection.AddAssetCreator(techset::CreateTechsetCompilerIW3(memory, searchPath));
+
+        collection.AddSubAssetCreator(techset::CreateTechniqueCompilerIW3(memory, zone, searchPath));
+        collection.AddSubAssetCreator(techset::CreateVertexDeclCompilerIW3(memory));
     }
 
     void ConfigurePostProcessors(AssetCreatorCollection& collection,
@@ -39,5 +45,6 @@ void ObjCompiler::ConfigureCreatorCollection(AssetCreatorCollection& collection,
                                              IOutputPath& outDir,
                                              IOutputPath& cacheDir) const
 {
+    ConfigureCompilers(collection, zone, searchPath);
     ConfigurePostProcessors(collection, zone, zoneDefinition, searchPath, zoneStates, outDir);
 }
diff --git a/src/ObjCompiling/Techset/TechniqueCompiler.cpp.template b/src/ObjCompiling/Techset/TechniqueCompiler.cpp.template
index 9d5e194c..14d6facc 100644
--- a/src/ObjCompiling/Techset/TechniqueCompiler.cpp.template
+++ b/src/ObjCompiling/Techset/TechniqueCompiler.cpp.template
@@ -1,4 +1,4 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/TechniqueCompiler" + GAME + ".cpp"
 
@@ -9,6 +9,7 @@
 #if GAME == "IW3"
 #define FEATURE_IW3
 #define IS_DX9
+#define SHADERS_ARE_SUBASSETS
 #elif GAME == "IW4"
 #define FEATURE_IW4
 #define IS_DX9
@@ -278,7 +279,10 @@ namespace
         std::string lowerTechniqueName(commonTechnique.m_name);
         utils::MakeStringLowerCase(lowerTechniqueName);
 
-#if defined(FEATURE_IW4)
+#if defined(FEATURE_IW3)
+        if (lowerTechniqueName == "zprepass")
+            technique.flags |= MTL_TECHFLAG_ZPREPASS;
+#elif defined(FEATURE_IW4)
         // Not a particularly cool way to do this but...
         // the game actually does this :shrug:
         if (lowerTechniqueName == "zprepass")
@@ -290,7 +294,7 @@ namespace
 
         if (technique.flags & MTL_TECHFLAG_USES_FLOATZ && lowerTechniqueName.starts_with("distortion_"))
             technique.flags = (technique.flags & ~MTL_TECHFLAG_USES_FLOATZ) | MTL_TECHFLAG_USES_DISTORTION_FLOATZ;
-            
+
         if (ShouldApplyFlag200(technique))
             technique.flags |= TECHNIQUE_FLAG_200;
 #elif defined(FEATURE_T6)
@@ -454,9 +458,7 @@ namespace
 
         void FinalizeZone(AssetCreationContext& context) override
         {
-#if defined(FEATURE_IW4)
-            // TODO
-#elif defined(FEATURE_T6)
+#if defined(FEATURE_T6)
             const auto materials = m_zone.m_pools.PoolAssets<AssetMaterial>();
             for (auto* materialAsset : materials)
             {
diff --git a/src/ObjCompiling/Techset/TechniqueCompiler.h.template b/src/ObjCompiling/Techset/TechniqueCompiler.h.template
index a1bbe9f0..300d599e 100644
--- a/src/ObjCompiling/Techset/TechniqueCompiler.h.template
+++ b/src/ObjCompiling/Techset/TechniqueCompiler.h.template
@@ -1,4 +1,4 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/TechniqueCompiler" + GAME + ".h"
 
diff --git a/src/ObjCompiling/Techset/TechsetCompiler.cpp.template b/src/ObjCompiling/Techset/TechsetCompiler.cpp.template
index 38a4890f..980926d0 100644
--- a/src/ObjCompiling/Techset/TechsetCompiler.cpp.template
+++ b/src/ObjCompiling/Techset/TechsetCompiler.cpp.template
@@ -1,4 +1,4 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/TechsetCompiler" + GAME + ".cpp"
 
diff --git a/src/ObjCompiling/Techset/TechsetCompiler.h.template b/src/ObjCompiling/Techset/TechsetCompiler.h.template
index 6e6d8abd..ce6ff411 100644
--- a/src/ObjCompiling/Techset/TechsetCompiler.h.template
+++ b/src/ObjCompiling/Techset/TechsetCompiler.h.template
@@ -1,4 +1,4 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/TechsetCompiler" + GAME + ".h"
 
diff --git a/src/ObjCompiling/Techset/VertexDeclCompiler.cpp.template b/src/ObjCompiling/Techset/VertexDeclCompiler.cpp.template
index b3a9ba17..ad6dcc04 100644
--- a/src/ObjCompiling/Techset/VertexDeclCompiler.cpp.template
+++ b/src/ObjCompiling/Techset/VertexDeclCompiler.cpp.template
@@ -1,4 +1,4 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/VertexDeclCompiler" + GAME + ".cpp"
 
@@ -8,6 +8,7 @@
 
 #if GAME == "IW3"
 #define FEATURE_IW3
+#define IS_SUB_ASSET
 #elif GAME == "IW4"
 #define FEATURE_IW4
 #elif GAME == "IW5"
diff --git a/src/ObjCompiling/Techset/VertexDeclCompiler.h.template b/src/ObjCompiling/Techset/VertexDeclCompiler.h.template
index c7c4b6a5..32f66784 100644
--- a/src/ObjCompiling/Techset/VertexDeclCompiler.h.template
+++ b/src/ObjCompiling/Techset/VertexDeclCompiler.h.template
@@ -1,9 +1,10 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/VertexDeclCompiler" + GAME + ".h"
 
 #if GAME == "IW3"
 #define FEATURE_IW3
+#define IS_SUB_ASSET
 #elif GAME == "IW4"
 #define FEATURE_IW4
 #elif GAME == "IW5"
@@ -12,6 +13,7 @@
 #define FEATURE_T5
 #elif GAME == "T6"
 #define FEATURE_T6
+#define IS_SUB_ASSET
 #endif
 
 // This file was templated.
@@ -27,7 +29,7 @@
 
 #set CREATE_COMPILER_METHOD "CreateVertexDeclCompiler" + GAME
 
-#if defined(FEATURE_T6)
+#if defined(IS_SUB_ASSET)
 #define INTERFACE_NAME ISubAssetCreator
 #else
 #define INTERFACE_NAME IAssetCreator
diff --git a/src/ObjLoading/Game/IW3/ObjLoaderIW3.cpp b/src/ObjLoading/Game/IW3/ObjLoaderIW3.cpp
index 3d77d604..d8656beb 100644
--- a/src/ObjLoading/Game/IW3/ObjLoaderIW3.cpp
+++ b/src/ObjLoading/Game/IW3/ObjLoaderIW3.cpp
@@ -6,6 +6,8 @@
 #include "Game/IW3/IW3.h"
 #include "Game/IW3/Image/ImageLoaderEmbeddedIW3.h"
 #include "Game/IW3/Image/ImageLoaderExternalIW3.h"
+#include "Game/IW3/Techset/PixelShaderLoaderIW3.h"
+#include "Game/IW3/Techset/VertexShaderLoaderIW3.h"
 #include "Game/IW3/XModel/LoaderXModelIW3.h"
 #include "Localize/AssetLoaderLocalizeIW3.h"
 #include "Material/LoaderMaterialIW3.h"
@@ -118,6 +120,9 @@ namespace
         // collection.AddAssetCreator(std::make_unique<AssetLoaderImpactFx>(memory));
         collection.AddAssetCreator(raw_file::CreateLoaderIW3(memory, searchPath));
         collection.AddAssetCreator(string_table::CreateLoaderIW3(memory, searchPath));
+
+        collection.AddSubAssetCreator(techset::CreateVertexShaderLoaderIW3(memory, searchPath));
+        collection.AddSubAssetCreator(techset::CreatePixelShaderLoaderIW3(memory, searchPath));
     }
 } // namespace
 
diff --git a/src/ObjLoading/Techset/PixelShaderLoader.cpp.template b/src/ObjLoading/Techset/PixelShaderLoader.cpp.template
index 19de8f72..d02e87bb 100644
--- a/src/ObjLoading/Techset/PixelShaderLoader.cpp.template
+++ b/src/ObjLoading/Techset/PixelShaderLoader.cpp.template
@@ -1,4 +1,4 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/PixelShaderLoader" + GAME + ".cpp"
 
@@ -8,6 +8,7 @@
 #if GAME == "IW3"
 #define FEATURE_IW3
 #define IS_DX9
+#define IS_SUB_ASSET
 #elif GAME == "IW4"
 #define FEATURE_IW4
 #define IS_DX9
diff --git a/src/ObjLoading/Techset/PixelShaderLoader.h.template b/src/ObjLoading/Techset/PixelShaderLoader.h.template
index 05933dab..bc2a1731 100644
--- a/src/ObjLoading/Techset/PixelShaderLoader.h.template
+++ b/src/ObjLoading/Techset/PixelShaderLoader.h.template
@@ -1,9 +1,10 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/PixelShaderLoader" + GAME + ".h"
 
 #if GAME == "IW3"
 #define FEATURE_IW3
+#define IS_SUB_ASSET
 #elif GAME == "IW4"
 #define FEATURE_IW4
 #elif GAME == "IW5"
@@ -12,6 +13,7 @@
 #define FEATURE_T5
 #elif GAME == "T6"
 #define FEATURE_T6
+#define IS_SUB_ASSET
 #endif
 
 // This file was templated.
@@ -28,7 +30,7 @@
 
 #set CREATE_LOADER_METHOD "CreatePixelShaderLoader" + GAME
 
-#if defined(FEATURE_T6)
+#if defined(IS_SUB_ASSET)
 #define INTERFACE_NAME ISubAssetCreator
 #else
 #define INTERFACE_NAME IAssetCreator
diff --git a/src/ObjLoading/Techset/VertexShaderLoader.cpp.template b/src/ObjLoading/Techset/VertexShaderLoader.cpp.template
index fb68e435..3e02b330 100644
--- a/src/ObjLoading/Techset/VertexShaderLoader.cpp.template
+++ b/src/ObjLoading/Techset/VertexShaderLoader.cpp.template
@@ -1,4 +1,4 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/VertexShaderLoader" + GAME + ".cpp"
 
@@ -8,6 +8,7 @@
 #if GAME == "IW3"
 #define FEATURE_IW3
 #define IS_DX9
+#define IS_SUB_ASSET
 #elif GAME == "IW4"
 #define FEATURE_IW4
 #define IS_DX9
diff --git a/src/ObjLoading/Techset/VertexShaderLoader.h.template b/src/ObjLoading/Techset/VertexShaderLoader.h.template
index b9e37b0d..83957393 100644
--- a/src/ObjLoading/Techset/VertexShaderLoader.h.template
+++ b/src/ObjLoading/Techset/VertexShaderLoader.h.template
@@ -1,9 +1,10 @@
-#options GAME(IW4, T6)
+#options GAME(IW3, IW4, T6)
 
 #filename "Game/" + GAME + "/Techset/VertexShaderLoader" + GAME + ".h"
 
 #if GAME == "IW3"
 #define FEATURE_IW3
+#define IS_SUB_ASSET
 #elif GAME == "IW4"
 #define FEATURE_IW4
 #elif GAME == "IW5"
@@ -12,6 +13,7 @@
 #define FEATURE_T5
 #elif GAME == "T6"
 #define FEATURE_T6
+#define IS_SUB_ASSET
 #endif
 
 // This file was templated.
@@ -28,7 +30,7 @@
 
 #set CREATE_LOADER_METHOD "CreateVertexShaderLoader" + GAME
 
-#if defined(FEATURE_T6)
+#if defined(IS_SUB_ASSET)
 #define INTERFACE_NAME ISubAssetCreator
 #else
 #define INTERFACE_NAME IAssetCreator