Hello All, I just stumbled across this website<http://research.gg.uwyo.edu/kincaid/3dcave.htm>and thought I would share with this list since I know some of you are actively developing software for modelling caves in 3D. In the 'Programming Codes <http://research.gg.uwyo.edu/kincaid/Modeling/Comp_codes/codes.htm>' section, the author makes available the MATLAB script he used to generate his models. The code is freely available and modifiable and seems to be fairly well commented. I doubt the code itself is all that useful, but perhaps the algorithms might be. Hopefully it isn't old-hat. At the very least, there are some pretty renderings! link: http://research.gg.uwyo.edu <tr_1204907058820>/kincaid/3dcave.htm <http://research.gg.uwyo.edu/kincaid/3dcave.htm> -Jonny -- ^v^ ^v^ ^v^ Take nothing but pictures, ^v^ Leave nothing but footprints, ^v^ Kill nothing but time. (**)