Radius color to transparency overlay

[rich2005]

The spotlight brushes are usually very good. If you want to try your hand at using basic Gimp 2.10 tools this little video demo.





direct link https://youtu.be/f2Rtv4_F0Ks duration 3 and a half minutes

Once it is set up, just play around with opacities, layer modes, maybe apply a colour curve to the copied area of the map.