In Garry's Mod you can modify the colors in-game by choosing the color mod tool and messing around with it, changing the contrast, brightness, RGB etc. Can you do that in normal hl2? Using an entity. I would really like to be able to do that, is there a way (Even if I have to do a console command or something) because I would like it for my MOD.

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Hahaha! Im using the INTERNET!

Because it has been done, it can be done. Because it was done with a mod, it will most likely require a mod. Because you are making a mod, you most likely will be able to incorporate the effect.

As to how, I have no clue. I doubt however that its a possibility with HL2DM because I have yet to see it, and I have seen a lot.

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The best things in life, aren't things.

Hmm, I know it will require programming. I would like to know how I could do it in HL2DM or CSS (Ive stopped the mod, and moved onto MP mapping)

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Hahaha! Im using the INTERNET!

A good place to start looking would be http://developer.valvesoftware.com/wiki/SDK_Docs
(I remember Garry wrote an article on motion blur a few months back)

or, the Garry's Mod forums.

It may be doable without a mod, since all of the source games have the fade-in effect (AFAIK), you may be able to do it using that. Then again thats just fade to/from black, so maybe not, but it would make sense for that to be a color overlay. One drawback to that though is that it has that annoying single pixel line across the top and left sides of the screen that isn't affected.

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o