Was going to write it down but you beat me :).
Very appreciated, thank you everyone who contributed to these docs.

Makes sense, thank you.
Putting everything under a Collection in the Building.blend file and linking that collection and then doing Make Library Override Hierarchy works fine.

Is there any workaround at the moment?

Thank you!! Fixed the issue, basically I did a workaround in the algorithm and while it worked in 2.9x it doesn't anymore in 3.0x for some reason, so fixed the workaround. Thank you again for pointing me to the right direction.

Thank you very much!

I don't think I have commit rights... may I just ask you to commit it for me?
So the changes are:

Hey @Drew Perttula (drewp) I'm the author of the add-on. Thank you very much for finding what was slowing down the process! Great work!
Just went ahead and added the changes to the repo https://github.com/marcopavanello/real-snow , hope it's ok for you to have your name in the list of authors in the bl_info.
Thank you again!

I can only say it may be a numerical precision issue, pin pointed the issue and seems to happen when switching from a 0.05 to a 0.06 Sun Size.
Also, this may not be relevant to the issue but, since this commit the sun size is clamped internally to 0.0005 https://developer.blender.org/rCb40cde55cb6ee375eb4e514bec7bb294d6beda04

• Bump subversion

• update master

@Brecht Van Lommel (brecht) not sure what you mean, testing doesn't give the problem you are mentioning

Right, it's not related to the Sky Texture specifically but to every light really, so i would close this as invalid