I had -StaticPropLighting, but it didn't help. Then i tried to add -StaticPropPolys -TextureShadows and i think it fixed it now.
Thanks for tip with info_lighting anyway!
In the future, if you still encounter issues like this even after using all that stuff, you can also try turning off self-shadowing of individual props. Self-shadowing is like ambient occlusion except it sucks.
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