final MaterialState ms = new MaterialState();
ms.setColorMaterial(ColorMaterial.Diffuse);
_root.setRenderState(ms);
_passManager = new BasicPassManager();
// setup some quads for debug viewing.
final RenderPass renderPass = new RenderPass();
final int quadSize = _canvas.getCanvasRenderer().getCamera().getWidth() / 10;
_orthoQuad = new Quad[ParallelSplitShadowMapPass._MAX_SPLITS];