As you can see in the images from @asek.s post:
there are two projections of the projection material in a row when the asset has the shape of a U. One projection is on the outside, the other on the inside of the asset.
In my case, where I am also working with a U-shaped asset, I only want to have one projection of the projection material on the outside and get the bounding box information for this projection on the asset. (The double projection also affects the bounding box)
How can I get only one projection on the outside of the asset?