I've somehow gotten the impressions that the func_Areaportal is somehow more sensitive and 'touchy' than the standard world brush with areaportal texture applied. The reason i say this is that the compile log was giving me leak errors with point file that pointed nowhere. the lines just went in circles or didn't go anywhere at all. This is not a normal areaportal leak, i know what those look like. The problem was being caused by func_Areaportals, though, which doesn't make much sense. I did fix the problem after converting everything to the world-brush kind -which valve maps seems to like- but it just seems strange that one version doesn't cause leaks while the other does. Of course, the func_Areaportal & areaportalwindow are controllable versions, but does that functionality and being tied to an entity affect the 'stability' of the compile process? Roughly 70 areaportals of which half were the func_areaportal kind. Anyone else notice this, or am i just seeing things while under the influence of Hammer?