Post-process shaders using in map.

[ozonozgur]

I want using shaders in map. How to using custom post-processing shaders in map with Hammer? Thanks for advice.

[Exho]

I'm no Hammer expert but I think the closest you'll ever get is Color Correction. Hammer is a level editor, not an interface to interact with the game's main code base. You'll have to make a mod to use shaders IIRC

[0bama]

You can't use hammer, but you can always include lua files in the addon when you upload it to workshop.