Ground Control works fine in latest version of dgVoodoo.

But, when it's launched by GameRanger it has a bit of slowdown, like it's capped to 30 fps, and when it's launched a second time with 4096 MBs of vram it just gets atrocious fps (like 10, even with enumerate refresh rates). Giving it less or more vram changes how many times you can launch it from GameRanger before the slowdown starts happening.

Changing the settings of dgVoodoo or the ingame video mode options will also "fix" it, until you launch it enough times from GameRanger again. Launching GC outside of GameRanger is fine, even when the slowdown is in effect.

Alt-entering/exiting fullscreen removes the slowdown and returns it to the 30 fps cap (and entering fullscreen again returns it).

Here's the freeware download for GC so you can test it: https://www.moddb.com/games/ground-control/do … control-install
(if you don't have it)

Edit: It doesn't get this issue when the resolution is unforced.

Edit edit: When using the gc resolution changer (https://gitlab.com/fkrull/gc-resolution-changer/-/releases) it can sometimes get double inputs (also only a GameRanger issue) Only an issue when using gameranger (and only effects the main menu) and it isn't related to the gc resolution changer or dgvoodoo.