I'm wondering if you could add something like overlapping a certain colour? It would be quite a useful feature for hitboxes and such.
Hm, like overlay redux in MMF? That indeed would be nice to have...
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What current problem with hitboxes would this solve?
It's generally expensive to try and retrieve the colour of a pixel somewhere on a texture and send it back to the CPU, so I think another solution would be best.
You could use color filters?
put all your objects of that color in a family.
Red objects -> add them to the red family
blue objects -> add them to the green family (just to make people wonder)
green objects -> add them to the salt 'n pepa family!
Oh wow, a brand new family when you add red to blue....