diff --git a/src/materials/CopyMaterial.ts b/src/materials/CopyMaterial.ts
index 1c5157f50..b6ffc8ebd 100644
--- a/src/materials/CopyMaterial.ts
+++ b/src/materials/CopyMaterial.ts
@@ -34,6 +34,12 @@ export class CopyMaterial extends FullscreenMaterial {
 
 	}
 
+	override get inputBuffer(): Texture | null {
+
+		return super.inputBuffer;
+
+	}
+
 	override set inputBuffer(value: Texture | null) {
 
 		const colorWrite = value !== null;