final CullState cs = new CullState();
cs.setEnabled(true);
cs.setCullFace(CullState.Face.Back);
setRenderState(cs);
final MaterialState materialState = new MaterialState();
materialState.setAmbient(MaterialFace.FrontAndBack, new ColorRGBA(1, 1, 1, 1));
materialState.setDiffuse(MaterialFace.FrontAndBack, new ColorRGBA(1, 1, 1, 1));
materialState.setSpecular(MaterialFace.FrontAndBack, new ColorRGBA(1, 1, 1, 1));
materialState.setShininess(MaterialFace.FrontAndBack, 64.0f);
setRenderState(materialState);
blendState = new BlendState();
blendState.setBlendEnabled(true);
blendState.setSourceFunction(BlendState.SourceFunction.SourceAlpha);