๓ลาวลส, are you aware of shear-warp factorisation renderers such as VolPack? http://www-graphics.stanford.edu/software/volpack/ So far, this seems to be the most advanced algorithm I am aware of. The library is OpenSource, btw. I was able to build it under Linux without problems. sz writes: > Hello Wayne, > [interesting voxel stuff snipped] 'gene