Re: Ray-tracing on mobile phones
PoVRay is still current and still works in exactly the same way, script driven and is still FOSS with source code. There are GUI front-ends for it too. It evolved out of DKBTrace.
It's nice to see things which have not bloated beyond comprehension. Even when GUI based raytracers came along, I still liked PoVRay because it gave total control over exactly what I wanted to do, although having a GUI to make more complex 3D models was a great improvement and could be used in PoVRay.
I'll have to download the latest version and have a play now, dig out some of my old scripts. That's this weekend sorted!!