diff --git a/samples/utils/GUIUtil.ts b/samples/utils/GUIUtil.ts
index 3493d803..a1d54400 100644
--- a/samples/utils/GUIUtil.ts
+++ b/samples/utils/GUIUtil.ts
@@ -555,7 +555,7 @@ export class GUIUtil {
         });
 
         GUIHelp.add(mat, 'castShadow');
-
+        GUIHelp.add(mat, 'acceptShadow');
         open && GUIHelp.open();
 
         GUIHelp.endFolder();
diff --git a/src/assets/shader/materials/program/ShadowMapping_frag.ts b/src/assets/shader/materials/program/ShadowMapping_frag.ts
index 91f45280..91d9031d 100644
--- a/src/assets/shader/materials/program/ShadowMapping_frag.ts
+++ b/src/assets/shader/materials/program/ShadowMapping_frag.ts
@@ -142,6 +142,7 @@ export let ShadowMapping_frag: string = /*wgsl*/ `
           }
           visibility /= totalWeight;
       }
+      #endif
       return vec4<f32>(visibility, isOutSideArea, varying_shadowUV);
     }