This map's pretty neat. Here's some feedback:
-Really odd reflections on the floor behind these doors
-Blu's ghost hud seems to be missing
-clip the sides smooth
-These paintings still have their hangers on them even though they aren't attached to anything. Maybe edit the prop and remove it?
-Messed up lighting or misaligned textures, not sure which
-THIS is freaken AWESOME! A fantastic underworld that's visually stunning, not too complicated to navigate, and doesn't overstay it's welcome
-I'm not sure about the underworld exit popping out players RIGHT by the ghost/flag. I feel like that will make it very annoying to try and get through for whoever isn't ubered
-Why can't I get up here? There's nothing to indicate this is a blocked off area and it's really odd
-Really not a fan of these purple signs. Perhaps they would be better without the harsh light. Come to think of it the map overall is oddly purple and I'm not a huge fan of that
-While this sequence is really cool the first time, it gets kinda old somewhere after the 5th. Perhaps find a way to shorten it without losing the impact
-The soundscape in here has animal noises and I'm guessing it's from merc park. I'd suggest making a custom soundscape that's an edited version removing them
-I really don't like how I spawn facing away from the rest of the map. Perhaps make this general space and move the spawn area behind the doors in the first image I posted here
-use info_lighting to fix the dark prop here
-clip it smooth
-I can see the nodraw textures under these stairs in blu spawn
-A lot of stairs in this map have really messy textures
-If you pick up the ghost/flag while reloading, you'll be stuck in the reload animation where the game will keep trying to reload but never actually do it due to your character being scared. I'll keep trying to play the animation and replay the reload sound till you either drop the flag or cap it. Dunno what can be done about this
-Weird to see these props used like this while they still have their brackets for walls. Perhaps edit them and remove the brackets so it makes more sense.
Overall the maps pretty cool but It feels kinda small. I understand it's length is shorter due to having to walk slowly while frightened with the ghost/flag but it really feels like there's an area in the map that's missing. I do like the random events that can happen such as pumpkin bombs spawning or the HHH showing up instead of the underworld portal, but these seem to happen very rarely and I imagine wouldn't happen at all in most rounds. Don't know if that's on purpose or not, just thought I'd mention it.