@Override
    public boolean checkCulling(Camera cam) {
        if (isGrouped()) {
            setLastFrustumIntersection(Camera.FrustumIntersect.Outside);
            return false;
        }
        return super.checkCulling(cam);
    }
Create a geometry node with mesh data and material.

@param name The name of this geometry
@param mesh The mesh data for this geometry
@param material The material for this geometry
jme3-core/src/main/java/com/jme3/scene/Geometry.java