Best way to make an "outline texture" for an object?

I’m essentially wanting to make a “border” texture on objects, that gives them an outlined effect.

Similar to the game Bendy and the Ink Machine

image
Just starting with simple shapes right now so don’t need to tailor anything for complex geometry yet.

Highlights and things obviously won’t work.


I’ve tried using single decals but they end up horribly stretched when resizing.

Materials and textures don’t work since those would tile without a lot of manual fiddling per each situation they’re used.


Best result so far is from layering four individual decals but this creates the issue of visible white lines between each decal (No those aren’t there in the actual image, yes the resolution is high enough).

Hey, you know those items/layered clothing that you can buy from the marketplace? Try doing what they did.