You need to use an Image ID not a Decal ID. To know that you have the Image ID, the type would say “Image” instead of “Decal”.
Example:
There are two ways to get the Image ID, one long way and the short way.
The Long Way
- Subtract the Decal ID by 1. For example, the code is 19866760, subtract that by 1 and it becomes 19866759. Keep subtracting until the type shows up as Image, after getting the image, copy the Image ID and you’re all good to go.
The Short Way
- Open roblox studio, insert the decal in any part, the baseplate for example. Then find the baseplate in the list at the right side. If you cant find it, then simply open the following ( Note: This is only if you placed the decal on the baseplate ):
Once you open the following, you should see the title of your decal below the baseplate, the example I used is my dice decal. After that, click the title of your decal and go to the properties which should be below of the picture I just showed you which should look like this:
Then copy the Image ID in the texture ( Note: It’s the number after the “?id=” ) and after that, you’re all good to go.