Maybe use the GIMP wording, to be "more standard" (if I can say that)? I mean there is something "alike" in GIMP... (if and only if, I understood what you would like to do)
Wording would be like " Curvature Amount" Left, right, bottom, top? just an idea...
A screenshot with spherize in horizontal mode, just for the wording GIMP is using.
Wording would be like " Curvature Amount" Left, right, bottom, top? just an idea...
A screenshot with spherize in horizontal mode, just for the wording GIMP is using.