I didn't think that regular DOSBox had support for stuff like 3dFX does it? Or other weird APIs?
I had to use PCem to get support for that stuff.
I've had some success with installing windows in dosbox-x which has glide support. Faster and more lightweight than pcem/86box
I tried running the elder scrolls Redguard, on wine, which launches windows version of dosbox with glide support. Redguard is a weird beast which is installed only with windows installer, but the actual game runs in dos mode
Everything works but the frame rate isn't great
If anyone knows a good Redguard setup for Linux please mail me, you can guess my mail easily. Now I just run the gog version