First of, hello again Tdm forum. if you would like an explanation to why i have been gone for the last 3 years, i'd gladly take the discussion in a pm. Hopefully you have'nt missed me to much Now on to the matter at hand. I am close to completion at a map and suddenly theese errors appear, my english is to limited for me to explain in words, so i recorded a video showing of the first error. http://www.4shared.c...L/TDM_bug.html? it appears that everytime i look at this one specific area (visportals), all lights except ambient dissapear. The only changes made in this room (since it worked), is add monsterclip brush and changed values in a light source. second error is this TDM_bug.png: Offtopic im having problems setting up pathnodes, im trying to set up a dynamic path for a particular ai. So there is one path that he follows regularly and sometimes he strolls of on an optional path 25% chance. He completely ignores the optional path. Any map i could look into so i could get an idea of how this would work? the wiki on pathnodes does'nt clear things up for me. /thesnopp