underground_1

...very odd. im surprised theres no invalid solid structures. 1 thing i noticed was that you used more brushes than necassery. for example the back wall had about 10 brushes where it couldve had 1 which covered the whole back wall instead of splitting it to make it match the shape of the wall. remember yuo dont need multiple brushes for a solid that bulges outwards like the cylinder.

btw, snap to grid

Actually you do need >1 for the back wall because It's not shaped like a cylinder (when it spirals back up hl engine won't take it with only 1 brush). So, do you think it's too complex for part of a map or not? (I haven't finished it)

Just do a testcompile. As for complexity, no, it's actually a fairly simple map. But it's huge too... I'd say a bit too huge but that's up to you, depends on what you want the map to be off course.

Just a tip: make those lamps entities, e.g. func_wall. Good for the VIS process (those lamps don't really block visibility to other parts of the map, so why let them contribute to the VIS compile time? Nah, you'll learn about that later on), and also avoids face splitting. Not that that's really something to worry about the way you placed them, but when a brush touches another brush, the compile tools split that surface up into 4 part to avoid convex faces. When one of the brushes is an entity, they don't split up. Experiment a bit with that, and use 'gl_wireframe 1' in the console to see the effects.