add Clear, Texture and CubeTexture passes.
add Clear, Texture and CubeTexture passes.

bhouston/three.js,bhouston/three.js,bhouston/three.js,bhouston/three.js,Jozain/three.js,Jozain/three.js,bhouston/three.js,Jozain/three.js,Jozain/three.js,Jozain/three.js,Jozain/three.js,bhouston/three.js