Few people on this planet knows that Descent 1+2 are 3D games. No, not the lousy red-blue glass 3D, but really 3D with the so called LCD stereoglass technology. Way back when Descent 1 came out, I wasn't particularly impressed. I mean, it was nice, but......
As a coincidence I got a present from someone, an LCD stereoglass, with a shortened version of Descent. I installed it on my computer and my eyes popped up of the amazement. Words can not describe the HUGE difference. They can't, because one must see it. There is just no other way. Especially Descent 1 and 2 (opposed to 3), because it has the narrow tunnels, rather than the large rooms and open spaces and the 3d technology makes them look frighteningly real, as if you would be there. It blew my mind and I was hooked. I mean hooked to the point of playing it hours and hours in every free moment of my day.
Unfortunately, that 3d technology is gone. Only on Ebay one can pick up those old style glasses here and there, but if you can find one, it sells usually for a few bucks. Those are the LCD stereoglasses which are plugged into the printer port of the old computers (NOT the type Edimensional sells) and require a "driver like" program, called LCDBIOS. That still can be found on the internet.
To be perfectly honest, I have no idea whether they would work or not with DOSBOX. I should dig up my old glasses (boxed away in my basement) and check it. But if somebody out there knows what I am talking about and willing to spend a few dollars and experiment, get one, get Descent 1+2 here on GOG and you surely will have the ride of your life in the world of Descent. I sure had.
No no no it's not gone!! D2X-XL supports 3D rendering. Check here:
Unfortunately, XL requires a bunch of setup. I'd make a copy of your D2 directory, one for the game itself and one for XL.