So with the "Create Blueprint from Selection” tool is the prefab very good doable.
I try to deactivate some options and it looks like the “Convert to ISM” option makes problems. If its deactivate it works and also very quickly.
I also tried it in a demo project from the visual assets and there it works quite also quite well.
Maybe because my project is quite big already?
I really dont know what causes the problem.
Because the demo project works, it makes no sense to send it to you unfortunally.
Would it be possible to create the prefabs into the smaller project and migrate it to my real project without breaking something?
Or i have to use for big/many assets the built in prefab tool and yours for the smaller pieces that i can randomize.