Pretty neat. I kind of see how it works.
Edit: I can get 5lb of air dry clay for $10 from Walmart. I don't know if my cheap phone camera will work good but I might give this a try. I've been wanting to try for years.
This is an interesting article.
https://www.gamasutra.com/view/feature/131746/postmortem_dreamworks_.php?print=1Quote:
When we created our terrain geometry, we were deliberately trying to avoid the "marbles in rubber" look of a lot of bad fractally-generated outdoors terrain. To this end, we decided that we needed to base our island on real-world terrain rather than build it from scratch. Luckily, we had a real-world model to go from: Costa Rica’s Isla Sorna, the same island Crichton used as his inspiration for Site B. Unfortunately, no relief maps of sufficient detail existed for Isla Sorna, so we ended up having our lead artist sculpt a large model of the island, had it laser scanned, and did all our work on it in 3D Studio Max.