Hey there,
Sorry to pop in resurrecting this thread but I'm missing something - probably basic - here, while I'm really interesting in Fu9 adaptation from Fu16 and/or ReFusion 16.x
I think I had the same issue, see : I made a macro from a few nodes in ReFusion 16 and it appeared that inside the macro, a glow node wasn't interpretable in Fu9. Don't remember if it was a softglow, fastglow, glow, etc...
Anyway, I rebuild this macro in Fu9 to have it work everywhere but I'm interested in this Filter trick I read here...
I have no Fu here around so what am I supposed to do and where, please ?

*MacMini M1 16 Go - Sonoma - Ext nvme SSDs on TB3 - 14 To HD in 2 x 4 disks USB3 towers
*Legacy MacPro 8core Xeons, 32 Go ram, 2 x gtx 980 ti, 3SSDs including RAID
*Resolve Studio everywhere, Fusion Studio too
*https://www.buymeacoffee.com/videorhin