Thanks Jason, this is great. I started playing around with different images and I noticed something, though: if you use a square image for the foreground, the wormhole becomes elliptical. If you change the aspect ratio to 2:1, it goes back to a circle. When I use a square image for the background, the image inside the wormhole wraps and I get a vertical line in the middle of the interior. I don't know how to fix that issue...just wondering if you have any thoughts.
