Writes current TA_OL_BASE to all tiles OPB block. Read from region array
at render time to identify context.
Fixes vf4 water reflections RTT
get rid of dump_frame/read_frame
The previous algorithm to determine the sort mode for TR polys was
faulty. And the sort mode can vary between passes for multipass
rendering. This also removes the need for the hack to support Always
depth mode with autosorted TR polys. Should fix the Resident Evil 3 menu
problem.