I think im gonna hurt something...

[A Spork]

Ok, so my problem on Thule, with the funky shadow that messes with vis, has officially gotten worse...no clue what happened to change it, but not its also doing a HoM effect and making part of the ramp under the door its beside have a missing triangle...
I really need help on this one.
As far as I can tell, there's no brush doubling or anything, so im stuck.

[UniqPhoeniX]

Are you compiling with Net Radiant? *Anything* filtered out in View->Filter? Anything hidden (shift+H to unhide)? Select the brushes around there (including the light) 1 by 1, copy and move to somewhere else, and see if the problem occurs in the new location. Take a look at .prt for any weird angled portals near there. Any vertices off-grid around there?

[A Spork]

GTK Radiant
Only Hint Brushes.
Nothing Hidden
hmmm, the .prt does seem messed up there...it looks like there might not be a portal there at all(?)
Vertices all see fine

[UniqPhoeniX]

Try compiling with Net Radiant.

[A Spork]

No Different >.>

Here's the .map if anyone wants to take a swing at it...
http://spork.unvanquished.net/miscellaneous/thule-a5.map

[CreatureofHell]

I managed to fix it with a bit of crappy brushwork (I was trying to do it quickly, not wonderfully).
http://www.tremtopia.unvanquished.net/files/thule-a5.map

I deleted the brushes on the left inside the doorway and replaced them. Seemed to do the trick 

[A Spork]

Stalker, I <3 you.
It lives!