Changing Eye Colour (Colour only non-white parts of a texture?)

Questions & Answers
1

I’m fairly new to working with 3d models, so forgive me if I’m misunderstood some fundamentals here.

I’d like to change the eye colour of a model. There’s a separate material for the eyes already, though right now, if I colour the material, it colours the whole eye, not just the pupils. (e.g. 699-redeyes.png

Is there a way to colour just the non-white parts of the material? I am guessing that this may be something which can be achieved with shaders, but any help getting started with that would be appreciated.

Or, alternatively, if I am approaching this in totally the wrong way, do let me know! Would a better approach be to have a number of different eye textures altogether?

2

I would just create a texture with the desired look. Unless you have a reason for wanting it to be coloured in unity? In that case you could create different textures/materials and switch between them with a script. You will be able to create the look your going for much easier with textures rather than solid colours.

3

You could make three textures (red, green and blue) and let the player mix those.