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7 hours ago@Paranoidfactoid @monica_b1998 We actually do have masking on Adjustment Layer Groups. Basically, make a layer group in passthrough mode, put whatever combination of filters you want on it, then add a layer mask.
Someone even made a plug-in to simplify that process while we continue to work on the UX: https://github.com/yousei3/GIMP3-Aseudo-Adjustment-Layers/releases/tag/Ver1.0
@Paranoidfactoid Trust me, I’m well aware the UX can be a lot better - I’m the person who implemented initial non-destructive filters for GIMP 3.0. :)
I’m just saying that it can be done in GIMP right now, and I linked a plug-in that makes it easier (it adds a menu option that does all I said in a single step). I’m happy to hear feedback from people who use GIMP on how to improve it further.