How to check if a decal ID is valid

Hello. One of my projects was 90% done I guess but there was a problem. People could put an invalid decal ID and I still don’t know how to check if a decal ID is valid


What could be so game-breaking that when they put an invalid ID it matters so much?

The reason I ask is there’s probably better ways for this to be approached.

Well they would put invalid decal ID so that the decal is invisible and no body could submit an art on a painting

This should help you out:

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