Most of the time, I use either Lightroom’s cloning tool for dealing with dust on the sensor. If I want more control, I use the Photoshop clone stamp tool. But neither does a good job with smooth gradients.
Yesterday I was editing this image:
There were some dust spots in the sky. Because of the f-stop (f/8), the great distance between the top of the GFX sensor stack and the sensor itself, they were large and diffuse. Neither Lr’s nor Ps’s cloning tools worked well. So I tried Photoshop’s Content-Aware Fill tool.
It worked great. Give this a try, folks.