@harbinger

Disinterring this thread because i'm not finding the answers to a simple question: what do all the parameters mean both in definition and in application?

This old plug-in, although functional is no longer maintained, allows to modify the parameters of the Sunflow rendering engine directly in Sweet Home 3D from the PhotoRenderer.properties file.
For more information, you will find here the document "Configure the SunFlow rendering engine" detailing the definitions of each parameter.
(String or numeric values are editable from the arrows)