My little town revisited

More than 15 years of "GIMPing", and I still keep on learning new tricks! =D

As you may have noticed/guessed, I have combined here two polar coordinate images.

Instructions in short:

1) scale the base image to square.
2) duplicate the base layer.
3) add alpha channel to duplicate.
4) scale the duplicate by making it somewhat narrower (e.g. 3/5 ratio), and then run 'Layer to Image Size'.
5) run polar coordinates, and you should get 3/5 circular sector.
6) repeat stages from 2 to 5, except use 2/5 ratio for the duplicate, and use 'Map Backwards' when running the polar coordinates.
7) merge the circular sector images.
8) rotate layer, if you wish.
9) run 'Lens Distortion' to stretch the circle to corners. You can also first move the circle for example closer to bottom, and then with 'Main' and 'Y shift' stretch the image.

The whole idea is to create 'My Little Planet' images from almost any image, and avoid the problem of very obvious joint between edges. Because the sectors are not equally wide, the outcome is also much nicer.