I don't mean to disappoint but beta 4 didn't take me 10 years between betas this time lol....
-Made Clipz brushes around ladders haver the ladder texture flag. Hoping this fixes the climbing issue.
-Changed sun_ambient to sun_surface (also learned to use the value 1 and not 28) For ambient i always used 28 (idk why just did must have copied it from someone else map)
-Raised the sky box above the grates so we dont get the weird visual look.
-Added more grates in the mid/mid high areas.