@Ceciliabr

Any comment about the file size and quality of the rendered files?

This is a test file (SimpleRoom.sh3d) created by Puybaret.
I modified this one by moving the virtual visitor to see the whole room and used levels as a layer to choose between an empty room or furnished.
Quality 4 of YafaRay is different from Sunflow because each rendering engine has its own specificities.

This may not be very telling, but Emmanuel's feat is to have re-used the SH3D source files made for Sunflow to integrate YafaRay and keep the same presentation of the photo panel.

Some editable basic settings might be accessible through a future option of this plug-in or a new plug-in.

Enko