The GL port really renders better graphic to the old game. But it is still not full 3D like Quake for example. If you rotate around the dead bodies, their legs will always point to you, because it have limited images in the game (so not really 3D, but still raycasting).
I did not try the different wads, but the Batman mod I tried some years ago worked okay on the classic ports.
In my video it replays the original MIDI files of the game with the GUS and Timidity libraries. It uses less resources to play MIDI than MP3. When Doom was released for first time, MP3 was only starting and not yet popular. Most of the games at the time are using the crappy MIDI than sounds worse than Amiga MODs.
Its funny because playing Doom on my A1200 "feels wrong" because of the MIDI music.
