Obviously, all of the mappers did a lot more work than usual here, generating their own textures...
...and I do feel like the maps that turned out best have been the ones with no (or almost no) combat, where you can appreciate the vibes. Gnorlio's map is striking in monochrome, and Rorybabory achieves a strong "post-apoc ruin" vibe, neither with any monsters to distract you from the experience.
Of the maps with monsters, I think Naitelveni's is the most effective with her usual striking sense of design and an interesting tiered structure for level collectables.
I should also shout out the start map, which makes space to show off the maps that didn't make it in a "graveyard", so we can appreciate the texture design that did get done. I also appreciated the multi-tiered nightmare secret progression! Even if I am never going to play on Nightmare