Thank you all for your input. A couple of points:
The original idea...who cares
One light -house appliance-, one wall. White balance and arrangement of images at radom until good enough for the purpose.
The upper left is obviosly not a hat per se. It was everyones favorite!
It started as some serious experiment about the influence of the clothing an the impression it makes on others. This is so much more fun and not that far from it I think.