Kirk Andrews wrote:
> I've struggled for a long time to try and achieve an erosion effect in POV that
> is the least bit convincing.  I'm still not there, but perhaps I've made some
> headway.  I've been using proximity functions to simulation a little erosion.
> Maybe you know some better ways?

What exactly are you after? Deep ravines and washed-out plains? Or just 
simple textural wear and tear on ridges and outside rock edges? If it's 
the latter, I have a proximity macro I use for that sort of thing, one 
that's not bundled with the SSS macros. If it's the former, well, there 
are programs out there to achieve it:

World Machine:
http://www.world-machine.com/

^great erosion, but the demo version, while lasting forever, only lets 
you export small height maps. I tried tiling them in POV, as WM supports 
tiled landscapes, but as it turns out WM's tiling and erosion features 
don't not work well together. Sure, the maps are tiled, but there will 
always be a visible ridge at the seams :(

Wilbur:
http://www.ridgenet.net/~jslayton/wilbur.html

^I don't use this program very much. It's a little buggy, and the 
erosion isn't too good :(

You've probably already checked out these programs, but I listed them 
just in case. I really wish some talented programmer would make a 
*freeware* terrain program that has an awesome erosion algorithm, *and* 
exports in the 16-bit grayscale format.

Sam

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