second, I get glitched out graphics either on the title screen, or in the game itself, depending on whether I go straight to the title screen (run "gzdoom.exe" straight) or straight to any map (run "gzdoom.exe +map [map]")
on regular startup the title screen always looks like this:

and if I skip the title screen and go straight to a map (in this case map01) then it looks like this:

If I change the resolution, alt-enter, or otherwise refresh the display, it goes away and doesn't return until next startup. also, I guess loading a map counts as a refresh of some sort, because when I start to a title screen and then start a new game, it's all fine.
i'm hoping that can be fixed, as it's an inconvenience to have to un-glitch it all the time when running straight-to-map from Doom Builder.