@Override
    public void setModelBound(BoundingVolume modelBound) {
        this.worldBound = null;
        mesh.setBound(modelBound);
        setBoundRefresh();

        // NOTE: Calling updateModelBound() would cause the mesh
        // to recompute the bound based on the geometry thus making
        // this call useless!
        //updateModelBound();
    }
Sets the model bound to use for this geometry.
This alters the bound used on the mesh as well via
{@link Mesh#setBound(com.jme3.bounding.BoundingVolume) } and
forces the world bounding volume to be recomputed.

@param modelBound The model bound to set
jme3-core/src/main/java/com/jme3/scene/Geometry.java