Colour filtering in the game engine

Game Engine Game Engine Support and Discussion
1

Has anyone attempted creating a black and white filter for the game engine?

I am working on security camera overlays. A scene overlay with the green scanlines works really nicely but I would also like to do the nice black and white version.

The only thing I can think of is a black + transparent texture which is animated to create a ‘static’ effect but obviously the colours from the base scene are showing through.

The problem is that the only useable texture type is ‘additive’ and I think a subtract filer would be needed.

Perhaps python can strip colour information? Any thoughts would be appreciated.

Chimpoid

2

Not possible, we don’t have that kind of access to the rendering pipeline.

To approximate the effect you’d have to actually switch objects to a version with black and textures.

Or something equally awkward.

cheers
Piran

3

Thanks for your reply,

It looks like the green scanline effect will have to stay.

Thanks again

Chimpoid