Changed the file structure for ease of handling from tsd and added several utility classes.

threejs/three-effectcomposer.d.ts

@@ -0,0 +1,28 @@
+// Type definitions for EffectComposer.js
+// Project: https://github.com/mrdoob/three.js/blob/r68/examples/js/postprocessing/EffectComposer.js
+// Definitions by: Satoru Kimura <https://github.com/gyohk>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="./three.d.ts" />
+/// <reference path="./three-shaderpass.d.ts" />
+/// <reference path="./three-copyshader.d.ts" />
+
+declare module THREE {
+	export class EffectComposer {
+		constructor( renderer: WebGLRenderer, renderTarget?: WebGLRenderTarget);
+
+		renderTarget1: WebGLRenderTarget;
+		renderTarget2: WebGLRenderTarget;
+		writeBuffer: WebGLRenderTarget;
+		readBuffer: WebGLRenderTarget;
+		passes: any[];
+		copyPass: ShaderPass;
+		
+		swapBuffers(): void;
+		addPass(pass: any): void;
+		insertPass(pass: any, index: number): void;
+		render(delta: number): void;
+		reset(renderTarget?: WebGLRenderTarget): void;
+		setSize( width: number, height: number ): void;
+	}
+}