thx for your fast answer.
wow - first thing i did was bookmarking your youtube channel 
yea in a way that is exactly what i am looking for … but i cant get it to work …
if i follow your video then i get the same result … i see my image on the ground … i can scale that and so on … works fine …
but i cant figure out how i can put the image on a wall … i tried to rotate it by 90degrees but somehow that does not work