- Clipping is done on the SH4 side, garbage might be outside the screen
- Mod vols aren't drawn anyway for now
- I wonder how much does this cost on the rend-thread?
- make ta_skip to ta frame skipping instead of skipping parsing entierly. it handles 1 out of every (N+1) frames.
- re purpose rend to unstable opts, as pvr.rend is of no real use right now