public RenderBuffer getColorTarget(int index){
        return colorBufs.get(index);
    }
Adds a texture to one of the color Buffers Array. It uses {@link TextureCubeMap} ordinal number for the
position in the color buffer ArrayList.

@param colorBuf texture to add to the color Buffer
@param face position to add to the color buffer
jme3-core/src/main/java/com/jme3/texture/FrameBuffer.java