Here is a SH3D demo file for using the plug-in with new light sources and image-based lighting (sky with texture).If possible, I would suggest that you post a SH3D demo file in Ticket #18 that will show most of your settings (maybe with some explaining texts in the plan when necessary). The documents you wrote are certainly appreciated, but demos can help to show quickly how it works.
SunFlow rendering (Ambient Occlusion + sky lighting enabled)
EnkoNyito