What a nice idea to collect this urls! But anything for my Mac (not this discussion again)?? Especially some years ago i tested a little shareware program which was able to let you paint fractals in 3D space (voxels). I think that would be perfect to produce foam etc. BUT I FORGOT THE NAME - AND DELETED IT. Anybody any idea??? :-)) Walther

One day your ship comes in - but you're at the airport.