How would I create a paint effect?

So, I have been looking around for quite a while and found this post: https://devforum.roblox.com/t/whats-the-best-way-to-achieve-a-paint-effect-similar-to-this/98162/6

The user XAXA hints towards using very thin plates. If I would use this system, how would I go and make this easy? Like, I can't go around placing 10000 slabs, is there a way to do this the easy way?

• • like splatoon 2: !enter image description here