Sascha, there is a tutorial for it in the user guide (a roadsign).

I have a tutorial for it HERE IN GERMAN It were created in Vue 3, but it works the same in Vue 4. Take care "OBJECT SPACE" is "OBJECT STANDARD" in Vue 4.

In the above image, I used a plane for the graffiti, as shown in the tutorial.

Hope this helps:-)

Guitta