POV-Ray [plugin] (updated: 2016/Aug/08)

[micheus]

Micheus,In my environment, even if set the background-color to rgbt, I could't get transparent background.

Try the file I'm using: light_environment-skydome_export.pov

I don't have a deep understanding about the options...
Could you try filter and transmit option to the caustics problem?

The filter and transmit must be used in the object statement - that in this case would be the glass sphere.
A bit about them: Transparency - "filter" or "transmit"

To Wings3D PovRay Plugin developer. (Edited: 2016/8/11)
Do you have any plan enable set the rendering quality?

Are you asking me to add this option or it's just something you picked from an old post?
If so, how that can help someone. Check its results, although I didn't use a media statement: