Trying to get Feature ID Textures to work

Config/Engine.ini

@@ -127,4 +127,23 @@
 
 +FunctionRedirects=(
     OldName="CesiumFeatureTexturePropertyBlueprintLibrary.GetPropertyKeys",
-     NewName="CesiumPropertyTexturePropertyBlueprintLibrary.GetPropertyNames")
+     NewName="CesiumPropertyTexturePropertyBlueprintLibrary.GetPropertyNames")
+
++EnumRedirects=(OldName="ECesiumPropertyComponentType", NewName="ECesiumPropertyComponentType_DEPRECATED", ValueChanges=(
+    ("Uint8","Uint8_DEPRECATED"),
+    ("Float","Float_DEPRECATED"),
+    ))
+
++EnumRedirects=(OldName="ECesiumPropertyType", NewName="ECesiumPropertyType_DEPRECATED", ValueChanges=(
+    ("Scalar","Scalar_DEPRECATED"),
+    ("Vec2","Vec2_DEPRECATED"),
+    ("Vec3","Vec3_DEPRECATED"),
+    ("Vec4","Vec4_DEPRECATED"),
+    ))
+
++EnumRedirects=(OldName="ECesiumFeatureTableAccessType", NewName="ECesiumFeatureTableAccessType_DEPRECATED", ValueChanges=(
+    ("Unknown","Unknown_DEPRECATED"),
+    ("Texture","Texture_DEPRECATED"),
+    ("Attribute","Attribute_DEPRECATED"),
+    ("Mixed","Mixed_DEPRECATED"),
+    ))

Source/CesiumRuntime/Private/Cesium3DTileset.cpp

@@ -938,9 +938,8 @@ void ACesium3DTileset::LoadTileset() {
   const UCesiumFeaturesMetadataComponent* pFeaturesMetadataComponent =
       this->FindComponentByClass<UCesiumFeaturesMetadataComponent>();
   if (pFeaturesMetadataComponent) {
-    this->_featuresDescription = {pFeaturesMetadataComponent->FeatureIdSets};
-    this->_modelMetadataDescription = {
-        pFeaturesMetadataComponent->PropertyTables};
+    this->_featuresDescription = pFeaturesMetadataComponent->Features;
+    this->_modelMetadataDescription = pFeaturesMetadataComponent->ModelMetadata;
   } else {
     this->_featuresDescription = {};
     this->_modelMetadataDescription = {};

Source/CesiumRuntime/Private/CesiumEncodedFeaturesMetadata.cpp

@@ -119,7 +119,7 @@ std::optional<EncodedFeatureIdSet> encodeFeatureIdTexture(
   TRACE_CPUPROFILER_EVENT_SCOPE(Cesium::EncodeFeatureIdTexture)
 
   EncodedFeatureIdSet result;
-  EncodedFeatureIdTexture encodedFeatureIdTexture;
+  EncodedFeatureIdTexture& encodedFeatureIdTexture = result.texture.emplace();
 
   encodedFeatureIdTexture.channels = featureIdTextureView.getChannels();
   encodedFeatureIdTexture.textureCoordinateSetIndex =
@@ -147,12 +147,12 @@ std::optional<EncodedFeatureIdSet> encodeFeatureIdTexture(
     encodedFeatureIdTexture.pTexture->filter = TextureFilter::TF_Nearest;
 
     if (!encodedFeatureIdTexture.pTexture->pTextureData) {
-          UE_LOG(
-              LogCesium,
-              Error,
-              TEXT(
-                  "Error encoding a feature table property. Most likely could not allocate enough texture memory."));
-          return std::nullopt;
+      UE_LOG(
+          LogCesium,
+          Error,
+          TEXT(
+              "Error encoding a feature ID texture. Most likely could not allocate enough texture memory."));
+      return std::nullopt;
     }
 
     FTexture2DMipMap* pMip = new FTexture2DMipMap();
@@ -172,8 +172,6 @@ std::optional<EncodedFeatureIdSet> encodeFeatureIdTexture(
     pMip->BulkData.Unlock();
   }
 
-  result.texture = encodedFeatureIdTexture;
-
   return result;
 }
 } // namespace
@@ -234,6 +232,7 @@ EncodedPrimitiveFeatures encodePrimitiveFeaturesAnyThreadPart(
     encodedSet->name = name;
     encodedSet->index = i;
     encodedSet->propertyTableName = pDescription->PropertyTableName;
+
     result.featureIdSets.Add(*encodedSet);
   }
 

Source/CesiumRuntime/Private/CesiumEncodedFeaturesMetadata.h

@@ -35,6 +35,30 @@ struct FCesiumPrimitiveFeaturesDescription;
  */
 namespace CesiumEncodedFeaturesMetadata {
 
+/**
+ * Naming convention for encoded features + metadata material parameters
+ *
+ * Feature Id Textures:
+ *  - Base: "FIT_<feature table name>_"...
+ *    - Texture: ..."TX"
+ *    - Texture Coordinate Index: ..."UV"
+ *    - Channel Mask: ..."CM"
+ *
+ * Feature Texture Properties:
+ *  - Base: "FTX_<feature texture name>_<property name>_"...
+ *    - Texture: ..."TX"
+ *    - Texture Coordinate Index: ..."UV"
+ *    - Swizzle: ..."SW"
+ *
+ * Encoded Feature Table Properties:
+ *  - Encoded Property Table:
+ *    "FTB_<feature table name>_<property name>"
+ */
+static const FString MaterialTextureSuffix = "_TX";
+static const FString MaterialTexCoordSuffix = "_UV";
+static const FString MaterialChannelsSuffix = "_CHANNELS";
+static const FString MaterialNumChannelsSuffix = "_NUM_CHANNELS";
+
 #pragma region Encoded Primitive Features
 
 /**