public void setPassDrawBufferTargetIdToShaders(boolean v) {
        if (v) {
            if (!this.forcedOverrides.contains(boundDrawBufferId)) {
                this.forcedOverrides.add(boundDrawBufferId);
            }
        } else {
            this.forcedOverrides.remove(boundDrawBufferId);
        }
    }
Enable or disable passing the draw buffer target id to the shaders. This
is needed to handle FrameBuffer.setTargetIndex correctly in some
backends.

@param v
           True to enable, false to disable (default is true)
jme3-core/src/main/java/com/jme3/renderer/RenderManager.java