protected void setPostShadowParams() {
        postshadowMat.setColor("Splits", splits);
        for (int j = 0; j < nbSplits; j++) {
            postshadowMat.setMatrix4("LightViewProjectionMatrix" + j, lightViewProjectionsMatrices[j]);
            postshadowMat.setTexture("ShadowMap" + j, shadowMaps[j]);
        }        
    }
For debugging purpose Allow to "snapshot" the current frustum to the
scene
jme3-core/src/main/java/com/jme3/shadow/PssmShadowRenderer.java