after trying the "mat_fullbright" command, there's little white boxes (looks like wireframe boxes) appear, i found out those appear on the objects when i use the grav-gun, and at autosave points.
those are lighting points, where a light is placed, sometimes real lights. here's a screeny:
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i've tryed "showtrigger 0"; everything i can find in "cvarlist" witht the word "light" but they are still there!! pleaz help, they are really annoy!!!!!!!!!!!!