Should fix connected texture issues.

gradle.properties

@@ -10,6 +10,6 @@ fabric_asm_version=v2.0
 zt_zip_version=1.14
 slf4j_version=1.7.30
 
-mod_version = 1.0.0-beta5
+mod_version = 1.0.0-beta6
 maven_group = me.modmuss50
 archives_base_name = optifabric

src/main/java/me/modmuss50/optifabric/mixin/MixinClientBuiltinResourcePackProvider.java

@@ -0,0 +1,26 @@
+package me.modmuss50.optifabric.mixin;
+
+import me.modmuss50.optifabric.mod.OptifabricSetup;
+import me.modmuss50.optifabric.util.OptifineZipResourcePack;
+import net.minecraft.client.resource.ClientBuiltinResourcePackProvider;
+import net.minecraft.resource.ResourcePackProfile;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.io.File;
+import java.util.Map;
+
+@Mixin(ClientBuiltinResourcePackProvider.class)
+public class MixinClientBuiltinResourcePackProvider {
+
+	@Inject(method = "register", at = @At("RETURN"))
+	public <T extends ResourcePackProfile> void register(Map<String, T> registry, ResourcePackProfile.Factory<T> factory, CallbackInfo info)  {
+		File file = OptifabricSetup.optifineRuntimeJar;
+		if (file != null && file.isFile()) {
+			T optifineResourcePack = ResourcePackProfile.of("optifine", true, OptifineZipResourcePack.getSupplier(file), factory, ResourcePackProfile.InsertionPosition.TOP);
+			registry.put("optifine", optifineResourcePack);
+		}
+	}
+}

src/main/java/me/modmuss50/optifabric/mod/OptifabricSetup.java

@@ -21,6 +21,7 @@
 public class OptifabricSetup implements Runnable {
 
 	public static final String OPTIFABRIC_INCOMPATIBLE = "optifabric:incompatible";
+	public static File optifineRuntimeJar = null;
 
 	//This is called early on to allow us to get the transformers in beofore minecraft starts
 	@Override
@@ -37,6 +38,8 @@ public void run() {
 
 			OptifineInjector injector = new OptifineInjector(runtime.getRight());
 			injector.setup();
+
+			optifineRuntimeJar = runtime.getLeft();
 		} catch (Throwable e) {
 			if(!OptifabricError.hasError()){
 				OptifineVersion.jarType = OptifineVersion.JarType.INCOMPATIBE;

src/main/java/me/modmuss50/optifabric/util/OptifineZipResourcePack.java

@@ -0,0 +1,40 @@
+package me.modmuss50.optifabric.util;
+
+import com.google.gson.JsonObject;
+import net.minecraft.resource.ResourcePack;
+import net.minecraft.resource.ZipResourcePack;
+import net.minecraft.resource.metadata.ResourceMetadataReader;
+import net.minecraft.util.Formatting;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.function.Supplier;
+
+public class OptifineZipResourcePack extends ZipResourcePack {
+	public OptifineZipResourcePack(File file) {
+		super(file);
+	}
+
+	@Override
+	public String getName() {
+		return "Optifine Internal Resources";
+	}
+
+	@Override
+	public <T> T parseMetadata(ResourceMetadataReader<T> metaReader) throws IOException {
+		JsonObject pack = new JsonObject();
+		pack.addProperty("pack_format", 5);
+		pack.addProperty("description", "Added by OptiFabric\n" + Formatting.RED.toString() + "Do not disable");
+		pack.add("pack", new JsonObject());
+
+		if (!pack.has(metaReader.getKey())) {
+			return null;
+		}
+
+		return metaReader.fromJson(pack);
+	}
+
+	public static Supplier<ResourcePack> getSupplier(File file) {
+		return () -> new OptifineZipResourcePack(file);
+	}
+}

src/main/resources/optifabric.optifine.mixins.json

@@ -4,7 +4,8 @@
   "compatibilityLevel": "JAVA_8",
   "mixins": [
     "MixinReflectorClass",
-    "MixinScreen"
+    "MixinScreen",
+    "MixinClientBuiltinResourcePackProvider"
   ],
   "injectors": {
     "defaultRequire": 1