public static void resetCache(boolean stereo) {
        if( stereo == false ) {
            // only use this feature if we are NOT in VR
            // we can't use the same normal information for another eye,
            // because it will be different!
            lastNormalPassesCount = curCount;
        }
        cachedPreNormals = null;
        curCount = 0;
    }
Reset the cache
@param stereo <code>true</code> if the rendering is stereo based and <code>false</code> otherwise.
jme3-vr/src/main/java/com/jme3/post/PreNormalCaching.java