@Override
    protected void cleanUpFilter(Renderer r) {
        if (renderManager != null) {
            renderManager.setHandleTranslucentBucket(true);
        }

        initSoftParticles(viewPort, false);
    }
Override this method and return true if your Filter needs the scene texture
@return false
jme3-effects/src/main/java/com/jme3/post/filters/TranslucentBucketFilter.java