I really like this crypt, great atmosphere too. There's one little something that I've noticed though.

When I first looked at the pillars I thought they were floating. This has got to do with the floor textures, those stones are tiling under the pillars. In real life, the (floor) stones would stop right in front of the pillars and go around them so to speak. Such pillars go deeper in the ground than just at the floor level.

I'm not a perfectionist myself, but if you would want it to be really perfect ...

Cheers