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

node_modules/three/examples/js/postprocessing/AfterimagePass.js

@@ -0,0 +1,89 @@
+THREE.AfterimagePass = function ( damp ) {
+
+	THREE.Pass.call( this );
+
+	if ( THREE.AfterimageShader === undefined )
+		console.error( 'THREE.AfterimagePass relies on THREE.AfterimageShader' );
+
+	this.shader = THREE.AfterimageShader;
+
+	this.uniforms = THREE.UniformsUtils.clone( this.shader.uniforms );
+
+	this.uniforms[ 'damp' ].value = damp !== undefined ? damp : 0.96;
+
+	this.textureComp = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, {
+
+		minFilter: THREE.LinearFilter,
+		magFilter: THREE.NearestFilter,
+		format: THREE.RGBAFormat
+
+	} );
+
+	this.textureOld = new THREE.WebGLRenderTarget( window.innerWidth, window.innerHeight, {
+
+		minFilter: THREE.LinearFilter,
+		magFilter: THREE.NearestFilter,
+		format: THREE.RGBAFormat
+
+	} );
+
+	this.shaderMaterial = new THREE.ShaderMaterial( {
+
+		uniforms: this.uniforms,
+		vertexShader: this.shader.vertexShader,
+		fragmentShader: this.shader.fragmentShader
+
+	} );
+
+	this.compFsQuad = new THREE.Pass.FullScreenQuad( this.shaderMaterial );
+
+	var material = new THREE.MeshBasicMaterial();
+	this.copyFsQuad = new THREE.Pass.FullScreenQuad( material );
+
+};
+
+THREE.AfterimagePass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {
+
+	constructor: THREE.AfterimagePass,
+
+	render: function ( renderer, writeBuffer, readBuffer ) {
+
+		this.uniforms[ 'tOld' ].value = this.textureOld.texture;
+		this.uniforms[ 'tNew' ].value = readBuffer.texture;
+
+		renderer.setRenderTarget( this.textureComp );
+		this.compFsQuad.render( renderer );
+
+		this.copyFsQuad.material.map = this.textureComp.texture;
+
+		if ( this.renderToScreen ) {
+
+			renderer.setRenderTarget( null );
+			this.copyFsQuad.render( renderer );
+
+		} else {
+
+			renderer.setRenderTarget( writeBuffer );
+
+			if ( this.clear ) renderer.clear();
+
+			this.copyFsQuad.render( renderer );
+
+		}
+
+		// Swap buffers.
+		var temp = this.textureOld;
+		this.textureOld = this.textureComp;
+		this.textureComp = temp;
+		// Now textureOld contains the latest image, ready for the next frame.
+
+	},
+
+	setSize: function ( width, height ) {
+
+		this.textureComp.setSize( width, height );
+		this.textureOld.setSize( width, height );
+
+	}
+
+} );