The artist deliberately made these dark, but they're too dark too see! So, I did a quick-and-dirty batch light level adjustment, so you can see what's going on better.

This is a crude adjustment. The images are a bit grainy, which is normal when boosting light levels in dark photos. And I could definitely do better by adjusting each image individually, but that's a lot of work. Hopefully the artist will re-render these with brighter lighting eventually, though that's a lot of work too.