diff --git a/src/foundation/components/MeshRenderer/MeshRendererComponent.ts b/src/foundation/components/MeshRenderer/MeshRendererComponent.ts
index bb31cb26a..538c8235e 100644
--- a/src/foundation/components/MeshRenderer/MeshRendererComponent.ts
+++ b/src/foundation/components/MeshRenderer/MeshRendererComponent.ts
@@ -137,7 +137,7 @@ export class MeshRendererComponent extends Component {
     const primitiveUids = primitives.map((primitive) => primitive.primitiveUid);
     primitiveUids.push(-1);
 
-    MeshRendererComponent._lastOpaqueIndex = -1;
+    MeshRendererComponent._lastOpaqueIndex = primitives.length - 1;
     MeshRendererComponent._lastTransparentIndex = -1;
     MeshRendererComponent._firstTransparentSortKey = -1;
     MeshRendererComponent._lastTransparentSortKey = -1;
@@ -151,9 +151,6 @@ export class MeshRendererComponent extends Component {
         break;
       }
     }
-    if (MeshRendererComponent._lastOpaqueIndex === -1) {
-      MeshRendererComponent._lastOpaqueIndex = primitives.length - 1;
-    }
 
     if (primitives.length > 0) {
       MeshRendererComponent._lastTransparentIndex = primitives.length - 1;
diff --git a/src/foundation/geometry/Primitive.ts b/src/foundation/geometry/Primitive.ts
index 138b40742..3e5aaeedb 100644
--- a/src/foundation/geometry/Primitive.ts
+++ b/src/foundation/geometry/Primitive.ts
@@ -94,7 +94,7 @@ export class Primitive extends RnObject {
 
   set material(mat: Material) {
     this.__material = mat;
-    this.setSortKey(PrimitiveSortKey_BitOffset_Material, mat.materialTID);
+    // this.setSortKey(PrimitiveSortKey_BitOffset_Material, mat.materialTID);
     this.setSortKey(PrimitiveSortKey_BitOffset_TranslucencyType, mat.alphaMode.index);
     mat._addBelongPrimitive(this);
   }
@@ -151,7 +151,7 @@ export class Primitive extends RnObject {
       });
     }
     this.__mode = mode;
-    this.setSortKey(PrimitiveSortKey_BitOffset_PrimitiveType, mode.index);
+    // this.setSortKey(PrimitiveSortKey_BitOffset_PrimitiveType, mode.index);
 
     this.__primitiveUid = Primitive.__primitiveCount++;
     Primitive.__primitives[this.__primitiveUid] = this;