Per-Instance Unlit Shading

Hey folks, I've been working around a problem, and I was hoping to tackle it head-on and solve it once and for all...

Say I have a scene with 5 gameObjects. I want to have a side-by side image where one half are the objects rendered with one camera using the standard shader, and the other half are the objects are unlit, with a different color per instance.

Right now I'm just alternating frames, and using projectors, but that doesn't help me do a side-by-side.

 

Render dupes of the objects with replacement shaders in the other camera?

 

You write a shader that does standard shader things on one half and unlit things on the other half of the object

or,

* You render an image of the object(s) via replacement shader (mask of unlit or whatever)
* with a postprocessing shader, you blend this unlit mask on your original shaders with the variable that defines the half

 

You could just do one pass that renders the left side and one that renders the right. You could discard what you dont need in one pass and same in other, or not.

Replacement shader is also a way to go