The stalactites and columns look great I think there needs to be some more variation in he lighting though. The background is very uniform in how bright it is across the whole span of it and some areas fading off into a brighter or darker haze than others might help establish even more depth (and make some formations in front stand out more ) Of course, this would be "faking it" as caves really would be just dark all over, but I just mean for art's sake
You're one of my favorite digital painters. The sheer magnitude of your landscapes and details are always impressive. However, what really impresses me is that while this is a cave and it's "dark", you can still see all the details. Just wonderful!