How big is your model? You’re placing your clipping plane at a distance of 100 from your model’s origin, so that might be too far and why you’re not seeing anything.

I just tried it with a smaller distance and it looks like it’s working, here’s a Sandcastle example I modified to use your code and a smaller distance.

Let me know if that turns out to be it!

Does the example I linked to work for you?

If so, can you share a Sandcastle example of your code? Just go to Sandcastle (, and click “Share” and paste the link you get here.