diff --git a/src/ObjCommon/Material/JsonMaterial.h.template b/src/ObjCommon/Material/JsonMaterial.h.template
index f0eecbd0..b14bf10f 100644
--- a/src/ObjCommon/Material/JsonMaterial.h.template
+++ b/src/ObjCommon/Material/JsonMaterial.h.template
@@ -510,7 +510,6 @@ namespace GAME
 #if defined(FEATURE_T6)
         unsigned surfaceFlags;
         unsigned contents;
-        uint8_t probeMipBits;
         std::optional<std::string> thermalMaterial;
 #endif
 #endif
@@ -534,7 +533,6 @@ namespace GAME
 #if defined(FEATURE_T6)
         surfaceFlags,
         contents,
-        probeMipBits,
         thermalMaterial,
 #endif
 #endif
diff --git a/src/ObjLoading/Material/JsonMaterialLoader.cpp.template b/src/ObjLoading/Material/JsonMaterialLoader.cpp.template
index d1887d1f..49250488 100644
--- a/src/ObjLoading/Material/JsonMaterialLoader.cpp.template
+++ b/src/ObjLoading/Material/JsonMaterialLoader.cpp.template
@@ -436,9 +436,6 @@ namespace
 
             material.stateFlags = static_cast<unsigned char>(jMaterial.stateFlags);
             material.cameraRegion = jMaterial.cameraRegion;
-#if defined(FEATURE_T6)
-            material.probeMipBits = jMaterial.probeMipBits;
-#endif
 
             auto* techniqueSet = m_context.LoadDependency<AssetTechniqueSet>(jMaterial.techniqueSet);
             if (!techniqueSet)
diff --git a/src/ObjWriting/Game/T6/Material/DumperMaterialT6.cpp b/src/ObjWriting/Game/T6/Material/DumperMaterialT6.cpp
index 9f193037..56e11e97 100644
--- a/src/ObjWriting/Game/T6/Material/DumperMaterialT6.cpp
+++ b/src/ObjWriting/Game/T6/Material/DumperMaterialT6.cpp
@@ -31,5 +31,6 @@ void AssetDumperMaterial::DumpAsset(AssetDumpingContext& context, XAssetInfo<Mat
     const auto* material = asset->Asset();
     assert(material->info.gameFlags < 0x8000);
     assert(material->info.hashIndex == 0);
+    assert(material->probeMipBits == 0);
     DumpMaterialAsJson(*assetFile, *material, context);
 }
diff --git a/src/ObjWriting/Material/JsonMaterialWriter.cpp.template b/src/ObjWriting/Material/JsonMaterialWriter.cpp.template
index a29a1cf4..4cce4829 100644
--- a/src/ObjWriting/Material/JsonMaterialWriter.cpp.template
+++ b/src/ObjWriting/Material/JsonMaterialWriter.cpp.template
@@ -328,9 +328,6 @@ namespace
 
             jMaterial.stateFlags = material.stateFlags;
             jMaterial.cameraRegion = static_cast<GfxCameraRegionType>(material.cameraRegion);
-#if defined(FEATURE_T6)
-            jMaterial.probeMipBits = material.probeMipBits;
-#endif
 
             if (material.techniqueSet && material.techniqueSet->name)
                 jMaterial.techniqueSet = AssetName(material.techniqueSet->name);
diff --git a/test/ObjLoadingTests/Game/T6/Material/LoaderMaterialT6Test.cpp b/test/ObjLoadingTests/Game/T6/Material/LoaderMaterialT6Test.cpp
index 2d797315..454054a6 100644
--- a/test/ObjLoadingTests/Game/T6/Material/LoaderMaterialT6Test.cpp
+++ b/test/ObjLoadingTests/Game/T6/Material/LoaderMaterialT6Test.cpp
@@ -63,7 +63,6 @@ namespace
         "CASTS_SHADOW"
     ],
     "layeredSurfaceTypes": 536870925,
-    "probeMipBits": 0,
     "sortKey": 4,
     "stateBits": [
         {
diff --git a/test/ObjWritingTests/Game/T6/Material/DumperMaterialT6Test.cpp b/test/ObjWritingTests/Game/T6/Material/DumperMaterialT6Test.cpp
index c04e3458..30c83ec1 100644
--- a/test/ObjWritingTests/Game/T6/Material/DumperMaterialT6Test.cpp
+++ b/test/ObjWritingTests/Game/T6/Material/DumperMaterialT6Test.cpp
@@ -284,7 +284,6 @@ namespace
         "CASTS_SHADOW"
     ],
     "layeredSurfaceTypes": 536870925,
-    "probeMipBits": 0,
     "sortKey": 4,
     "stateBits": [
         {