Erosion is possible on heightfields in TG2, but not other surfaces (procedural). No other app has so far broken that limitation. The only ways I know of in Vue to do "arches" are metablobs ("hypertexture), sideways terrains (one side is always flat, you can stick 2 together, takes a bit of fiddling to make it look ok), or 3D objects. TG2 can do arches with 3D objects as well, of course. I think the displaced metablobs approach is probably the best, and it's something I'd like to see in TG2 at some point as well.
- Oshyan
