I'm not sure if this is a bug or not but in the world preview dropdown menu for new games, there's a blank "Upcycler" landscape. Also, the /evolution command prints out "Upcycler" as an apparent child-world of Nauvis. ChocoMaxXx's thread mentioned seeing "Upcycler" in the Remote View window, as if it were another world or space platform. I'm thinking this might be another two undesired effects of the same thing. If this is necessary for the functionality of the mod, I can happily ignore it. But I just wanted to point it out.

upcycler is a hidden surface that currently does not show in the remote view window, i was unaware the evolution command lists hidden surfaces too so that's a little unfortunate, but yes this surface is required for my mod to function (combinators that count and do other stuff are housed there), its just unfortunate they're visible in the evo command and during world creation.

Understood, it's not even really a problem. The evolution command is technically a debug feature, so using it at all is sort of "looking behind the curtain" anyways. Thank you for the clarification!

thanks for reporting it tho, it answers your question as well as anyone looking for an answer to that in the future.

the preview window thing is a bug however, so i reported that as such here: https://forums.factorio.com/viewtopic.php?f=7&t=124471