How to make a shader that renders each object in the scene in a different flat color?

Development Rendering
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1

I was attempting to see if the UE4 shader editor would support rendering based on the object id in the scene, but there does not seem to be a premade shader input for the object id or equivalent. Will I need to modify the renderer directly in order to make shaders using object ids as input?

2

You could use ObjectPositionWS to drive your color. With proper setup, it could give an appearance of all objects having random colors.

3

Thanks for the suggestion! That should work well, except in the case that things are moving in the scene, in which case their colors will change over time.

4

For your moving objects, You could assign individual material instances, and generate random colors in blueprints/code, rather doing it via shader.

5

That’s an interesting suggestion – thanks!