@Override
    public FrameBuffer getCurrentFrameBuffer() {
        if(mainFbOverride!=null){
            return mainFbOverride;
        }
        return context.boundFB;
    }
Copy the source buffer to the destination buffer, including both color
and depth.

@param src the source buffer (unaffected)
@param dst the destination buffer
jme3-core/src/main/java/com/jme3/renderer/opengl/GLRenderer.java