First I would like to thank all the RMWEB members who contributed to this topic. A special thank to JCL.
. Until then I built all my N layout buildings and structures using styrene and 3D printed parts ( doors, windows etc ... ) . First paper modeling is uncommon in north and south America. My opinion was: styrene brick , or stone wall is three dimensional, printed paper is not.
On the other hand printed buildings can be more detailed ( try to paint an N scale styrene brick wall brick by brick )
After reading a very interesting article in a french mag dedicated to narrow gauge model railways ( Voie libre et etroite ) I purchased the silhouette portrait 3 months ago.
First conclusion : I don't regret it.
I built a paper model engine shed for my belgian vicinal steam tramways .
It has 3 layers: windows and doors , brick or stone wall , external features : stills etc..
Here is a picture: