Black and white effect

Is there any method to make everything in black and white color? I'm trying to make an effect where the whole place, including units, turns black and white temporarily - any help appreciated!

No, but you can apply a black and/or white filter with less than 100% opacity.

Are you trying to create a 'WoW-like' death effect?

Yeah, something along those lines

I was thinking of making a map entirely black and white, but stopped, because the file-size would be too big for my liking. The only feasible way I found was to export all the textures and make new gray-scale textures using Photoshop. But that means a large map size.

If you want both color and b/w models, you would need to import new models with different texture paths that mirror the colored versions.

Of course, you could just make the hero b/w with some transparency. I bet that wouldn't look to bad.

Not quite what he needs though, Ammorth. He needs something that can be applied and removed at will; not a complete black-and-white game.

Closest would be Cinmatic - advanced filer, and using white mask with additive blending and low/mid opacity.