defensive

src/Rendering/prePassRenderer.ts

@@ -242,7 +242,7 @@ export class PrePassRenderer {
      * Restores attachments for single texture draw.
      */
     public restoreAttachments() {
-        if (this.enabled) {
+        if (this.enabled && this._defaultAttachments) {
             this._engine.bindAttachments(this._defaultAttachments);
         }
     }