Which game assets were custom made by your team?

If you chose Mixture, please explain below.
The wad file contains:
1) Our original work (map files, mapinfo, custom lumps and scripts).
2) Music assets reused (with permission) from other Doom-related projects and attributions are contained in the mod file.

The wad requires a legal copy of DOOM2 wad to run as it uses assets from that base file.