The UDMF format is a godsend. It's not been long since got my hands on DOOM 2 and I love designing maps for it. Please help me.
UDMF > Every other format
Also, I hope you're using the bugfix version of gzdoom builder.
You can literally get Doom maps on GMOD without porting.
I can run doom that's right.
gmDoom doesn't really cap the actual doom engine because source is 3D