fixy fix

build.gradle.kts

@@ -17,6 +17,7 @@ repositories {
     maven("https://maven.jamieswhiteshirt.com/libs-release") // Reach Entity Attributes
     maven("https://jitpack.io/") // Fabric ASM
     maven("https://maven.tterrag.com/") // Flywheel
+    maven("https://api.modrinth.com/maven")
 }
 
 dependencies {
@@ -33,6 +34,8 @@ dependencies {
     modImplementation("net.fabricmc.fabric-api:fabric-api:${"fabric_api_version"()}")
 
     modImplementation("com.simibubi.create:create-fabric-${"minecraft_version"()}:${"create_version"()}")
+
+    compileOnly("maven.modrinth:copycats:fabric.1.20.1-1.3.2") { isTransitive = false }
 }
 
 tasks.processResources {

src/main/java/dev/ithundxr/railwaystweaks/mixin/client/MultiStateCopycatModelMixin.java

@@ -0,0 +1,26 @@
+package dev.ithundxr.railwaystweaks.mixin.client;
+
+import com.copycatsplus.copycats.content.copycat.base.model.multistate.fabric.MultiStateCopycatModel;
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import net.minecraft.world.level.block.state.BlockState;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Pseudo;
+import org.spongepowered.asm.mixin.Unique;
+import org.spongepowered.asm.mixin.injection.At;
+
+import java.util.Map;
+import java.util.Set;
+
+@Pseudo
+@Mixin(MultiStateCopycatModel.class)
+public class MultiStateCopycatModelMixin {
+    @Unique
+    private Set<Map.Entry<String, BlockState>> railwaysTweaks$set;
+
+    @WrapOperation(method = "emitBlockQuads", at = @At(value = "INVOKE", target = "Ljava/util/Map;entrySet()Ljava/util/Set;"))
+    private Set<Map.Entry<String, BlockState>> railwaysTweaks$fixCopycatPlusCME(Map<String, BlockState> instance, Operation<Set<Map.Entry<String, BlockState>>> original) {
+        railwaysTweaks$set = original.call(instance);
+        return railwaysTweaks$set;
+    }
+}

src/main/resources/railwaystweaks.mixins.json

@@ -9,6 +9,7 @@
   ],
   "client": [
     "client.HttpTextureMixin",
+    "client.MultiStateCopycatModelMixin",
     "client.PlayerRendererMixin"
   ],
   "injectors": {