

I saw somewhere a command-line switch -sm2 (disables shaders entirely I think?), using that I can get a tolerable 21 fps.
#GZDOOM PERFORMANCE SOFTWARE#
If I disable fog and set the lighting mode from Software to Standard, I get up to ~14 fps. With GZDoom under my "normal" settings (1024x768, dynamic lights on but shaders for lights off, most other things maxed out) I get ~7 fps.

With GLBoom+, looking up from the starting point at the large tower (as in the screenshot), I get about 55 fps. The latest map I'm having problems with is The Spire 2 (also requires gothictx.wad) so I'll use it as a test case. I get pretty low fps counts with levels that go far beyond what vanilla Doom was meant to. I'm wondering if there are any options or things I can do to improve my performance. First of all I know GZDoom has historically had problems with ATI cards, and so I know not to expect too much.
