I've been learning GIMP to replace Photoshop in preparation. So far, so good, but there are still things about GIMP I just dont get. Like, it's seems impossible to paint onto a fully transparent layer because the paint tool doesn't modify the mask as it goes. I don't even want that layer to have an alpha channel, but it seems like you have no choice if you want a transparent layer.
If you try to paint on a transparent layer, you just get... nothing. It's so trivial in Photoshop to make a new layer and just paint into it, and I can't figure it out at all in GIMP. (I really should ask in a forum, but I also feel like I shouldn't have to.)
Being able to script in Python to simulate Photoshop actions is both awesome and crappy. It's awesome because of how powerful it is, but crappy that I can't just whip up an action in seconds to make a quick, repeatable edit.
I guess I'll have to use a VM to run Autodesk Fusion. ☹️