Ray Tracing

Goddamn all of these homework threads. Let's talk about something interesting.

I'm starting work on a ray-tracer for shits, /proggles/ Any tips on speed improvements? It's being written in C.
I know the show stopper (usually) is having to check each element in the scene and see if it has been intersected by a casted ray. Any ideas on improvements in that area?

OP back from the dead.
>>22
I've been looking for a good excuse to learn CUDA. I guess after I write this I could go back and use that to parallelize it.

>>23
Agreed.

>>25
Alright, I'll put it up. It probably won't all be in one file. Should I put everything together when I upload?

>>26
Sounds interesting. I'll look into that.