Yeah, well, subdivision surfaces. I’ve implemented them to render a formula 1 car that needed some smoothing – especially the wheels. But unfortunately, UV mapping is not as straight forward as I thought. Until now, I simply split the texture coordinates over the four new triangles, splitting in half over the edges. But that doesn’t quite work. It completely messes up the texture mapping. Well, it was a bit to be expected of course. So, I’ll have to find some more clever way to do it. Probably something along the same line as the vertex coordinates. But one thing that is worrying me is what to do if the texture mapping has seams over the model: when there’s a discontinuity in the texture coordinates, but not in the “observed texture”. To be continued =)

Bramz

You’re making a heck of a lot more progress with your raytracer than I am! (I’m off school now for the winter break, but haven’t done much programming – been watching too much TV!)