Welcome to TVPaint Community forums !

As of now in version 11.0.8, when "Preview" is checked on in the Fx Stack, we are only seeing a preview for one layer, regardless of the "Apply On settings." It would be nice to have the ability to preview your Fx Stack on multiple layers if you have selected "Apply On: All Layers" or "Apply On: Current Group.' This would help a lot for color tweaking purposes to be able to see the final outcome.

Thanks and keep up the great work!
harry