after compiling a portal map, everything appears to be normal but for some reason there is a strange purple effect whenever i move up real close to a wall.
it looks just like this:

it gets very ugly in dark/shadowy areas

im sure i followed NullSoldier's instructions perfectly (thanks to you btw, for making that thread :) about configuring hammer to work with portal.

this only seems to happen with my map lol, all other custom/campain maps work perfectly. i decompiled some campain maps and ive noticed that theres some env_cubemap entities scattered around, so ive tried adding some to my own map but it still has that damn purple effect.

does anyone know what im doing wrong?

i just rebooted portal to fix it

thanks man, i built the cube maps in hl2dm and now everything is working like it should be :D