The NIGHTMARE! Palace Concept Art

This was my first drawing and planning of The NIGHTMARE! Palace. Most of it is just sprites from DOOM. I did had this, but about a year ago, my XP died on me due to malware. Back when after the BSOD came, I didn't had an anti virus software with me. Not smart of me I managed to print screenshot on one of my videos to recover this. The map is mostly accurate to this.

Also please note, this was before I started mapping when I've drew this.