where is it?

While net surfing the other day I found a site and software that
would take a 2d image such as an oval and would extrude the 2d image
to 3d in a curved way sort of like watching bread rise. The oval 3d
image would be flat on the bottom and curved on the top. It could
then be saved as dxf. The beginning image could be anything - ovals,
letters, curved whatever's.

What I'm trying to do is find a better solution to carving a bmp
image. If I can create a solid of the oval and save as dxf that
would help.

Do any of you know where this site is?

Thanks,

Trent