I really wish I can donate, but I am just a student for now. Really awesome spherize effect. It’s better than Photoshop spherize for most applications. There’s something I’d like to point out.
I do wish that I don’t have to use the smooth to adjust the perceived tangency angle line on the edge of the circle. Hmm, if one is somehow able to alter the curves near the edge of the circle after smoothing, then this would be even better than Photoshop spherize effect for some task. Pinching the circle edge from the inside would be the answer to this problem or adjusting tangency angle would also be another answer. The second one would be better with some smoothing to fix the issue with altering tangency alone. But, that’s just a minor complaint, other than that, perfect.
I am looking at Euclidean to Polar, and I am finding that in theory, you might be able to fix that issue when smoothing is already applied by altering where the the edge is and then transforming it back to Euclidean.