const-z rendering again, but the detection has been fixed to work with positive and negative zeroes, so it's much more reliable (and faster). also made it color the viable surfaces red

testing a new feature for 486quake, where perfectly horizontal surfaces can be detected and optimized with a constant-z rendering algorithm (a la snes's mode7 graphics, or how doom renderer works)

this is testing only the detection - surfaces that could be optimized are rendered in plain grey instead of their normal texture.

this recording is done with cl_rollangle set to 0, which disables part of the view bobbing done by quake - the optimization is able to happen more often with this off.

testing a new feature for 486quake, where perfectly horizontal surfaces can be detected and optimized with a constant-z rendering algorithm (a la snes's mode7 graphics, or how doom renderer works)

this is testing only the detection - surfaces that could be optimized are rendered in plain grey instead of their normal texture.