/vr/ - Retro Games

Today I decided to make my first Doom level and give something back to the community.

>no idea what the different wad formats are
>decide to use basic Doom 1 format
>plot out a e1m1 replacement
>hallways and rooms too small, but the map is densely packed, so spend ages pulling the map apart and stretching out rooms and halls
>put windows everywhere because want to imitate that sweet Romero mapping style
>can't realign upper and lower textures separately because map format limitations
>check out how they handled it in the original game
>they just made windows really big or tweaked textures so the misalignment wasn't as obvious
>still feel like I've misjudged the room and hall sizes
Fuck.

It was really fun to draw the level and then fill it in with detailing, but the texturing and 'clutter' work is killing me.

I need some help to finish it /vr/.
What is the actual map format people use?
What size rooms feel 'right'?