@TheDane I think all the available renderers are fine with any AV.
It is just ACE protected servers with admin that do not maintain their whitelist that is a problem.
You may find using the DX10 renderer works better than the regular GL or DX9 renderers, though in any case don't forget to install the full DX9 runtime distro to add the missing older files.
Kentie hasn't updated his renderers for a long time, and so Smirftsch got his source to make his own branch.
It is probably worth using whatever the newest preferred stable version is at OldUnreal.
When updating an existing renderer, the ini lines will no longer match.
Use the advanced options window to tweak the updated renderers, so any missing switches will be added to the ini file, so next time you can see manually edit all of them.
BTW. meowcat mentioned he may port a smaller version of his YARM - Yet Another Real-life Mod to UT99.https://forums.beyondunreal.com/threads ... st-2627598
I wonder if certain members here would want to help that happen