As a Roblox Developer, it’s impossible to get the AssetID* from a DecalID** by any means of using scripts. The only “good” option is to find out the Decal’s Creator, and backtrack through IDs until you find an AssetID that is created by the same owner, except there is one issue. This method fails to work with Group Assets because of a mismatch with the creator of the Decal & creator of the Asset. If this was fixed to be corrected, it’d help me immensely in being able to get the AssetID from a Decal that users put into my game to create custom cars into my game, rather than skimming the thumbnail image which is in low 420x420 resolution. (Versus the normal 2048x2048 resolution of the car textures being used.)