is it possible to darken specific areas of maps to a definable level?

Regards,
iSpectra

Color correction is a little more difficult to create and creating step by step instructions would probably take up a page. However it controls contrast, levels or colours of the whole visible screen and I guess this would be one of the better solutions as you can define what exact areas the color correction will affect - however it would be an illusion and not an actual light change.

Honestly if your map is not too complex and you only want to change the lights in certain areas I would just change the light level of the light entities through an output.
- Probably the best way to do this is to use a env_projectedtexture and then turn it off and turn on a dimmer env_projectedtexture.
- You can also change the pattern of a light through an output, however this light will then fill up the light entdata.

Remember HDR! Lights fade and dim depending on how bright an area is for the player.

ChickenMobile wrote:
According the wiki fog volumes are only available in L4d.

Correct, but if you actually try in Portal2 it seeems to be working... Check:

H1U7ITaqC6M#!