I don't know if this help's. But I ran into various scripts that say, use lowest settings, detail etc. It says it supports Simba.
What does this mean? I Searched the Simba menu form. And found nothing to do with runescape graphic settings. Or in the scripts itself. How do I do this?
TURNS out through a little help, and trial and error... that your local Runescape settings from either your internet browser, SwiftKit or the Runescape launcher from Jagex itself apply to Simba. Whatever settings you normally play runescape with will be your current settings for Simba. So you will HAVE to switch back and forth between settings, unless you like the dull look.
So if you find yourself in this situation, now you know.
Hope this helps someone down the line.