Hi Xiste,

Is this Sunflow doc an available document?

Yes, here is the Sunflow Wiki PDF .

I have noticed a very annoying issue with both the default renderer and your renderer: They both shut down immediately and without warning if you hit “escape”. Is that something that can be fixed?

I never had the idea to press the escape key but it actually allows to close any open windows (Preferences, Modify 3D view, etc.) in Sweet Home 3D.
This is surely due to the way they are managed.

Enko