https://github.com/WWBN/AVideo/issues/8713

node_modules/three/examples/js/postprocessing/ClearPass.js

@@ -0,0 +1,41 @@
+THREE.ClearPass = function ( clearColor, clearAlpha ) {
+
+	THREE.Pass.call( this );
+
+	this.needsSwap = false;
+
+	this.clearColor = ( clearColor !== undefined ) ? clearColor : 0x000000;
+	this.clearAlpha = ( clearAlpha !== undefined ) ? clearAlpha : 0;
+	this._oldClearColor = new THREE.Color();
+
+};
+
+THREE.ClearPass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {
+
+	constructor: THREE.ClearPass,
+
+	render: function ( renderer, writeBuffer, readBuffer /*, deltaTime, maskActive */ ) {
+
+		var oldClearAlpha;
+
+		if ( this.clearColor ) {
+
+			renderer.getClearColor( this._oldClearColor );
+			oldClearAlpha = renderer.getClearAlpha();
+
+			renderer.setClearColor( this.clearColor, this.clearAlpha );
+
+		}
+
+		renderer.setRenderTarget( this.renderToScreen ? null : readBuffer );
+		renderer.clear();
+
+		if ( this.clearColor ) {
+
+			renderer.setClearColor( this._oldClearColor, oldClearAlpha );
+
+		}
+
+	}
+
+} );