2d Color swap shader

Unity Engine
1

Hello everyone,
I’m wondering what’s the best way get effect from this:

1452×800 189 KB

to this:

1321×703 35.4 KB

I’ve already try to get that effect by post processing and shaders (i’m totally newbie in writing shaders) but results wasn’t good enough. Map is generated dynamically from sprite palette.

I know I could create another sprites to get that effect but is it really necessary? :slight_smile:

Great solution is by ‘Makin stuff looks good in Unity’ video :

but it only works for four colours.
How you guys would recreate that effect?
Thanks in advance for responses.

2

I agree, a post proc Image effect on the camera would probably the simplest approach for that. The effect Looks like a simple Color conversion (using only the green channel, and creating a Grey value from that with a cap at 0.25).

Cheers,
-ch