Plugin for special black-level to apply at greater levels

[Ofnuts]

(03-18-2024, 12:17 PM)robertkjr3d Wrote: I really can see use of the in the case of planetary objects such as the Moon/Sun. "Astrophotography" shots.  Where the pattern of the light is brighter on the outer-edge of the disc (maybe) and you might want to apply a black-level from the outer edge inward at greater levels..... Or visa-versa (depending on the shot.)  It would be nice to have control like that. 

Some anti-vignetting tools give some control to apply similar controls to what I'm talking about.  But a custom Black-Level tool if someone knew how to create one would be cool.  Or 'Contrast-Apply' tool.

sometimes if I'm doing a half-moon, it may not be a perfect circle.  so it should work with the box-select and/or free-select tool.
or if you can think of another solution.  

Obviously I get by with 'Levels', 'Curves' and Balancing the 'Shadows-Highlights' screens.

• Create a circular selection
  
• Add a layer, set to Multiply mode (other modes such as Screen can also do the job)
  
• Fill with black-to-white (or white-to-black)  radial gradient, and while in the gradient tool:
  • You can change the opacity of the layer to adjust the "strength"
    
  • You can change the layer blend mode
    
  • Hover need the middle of the gradient (this makes the midpoint appear) and click on it. You can then:
    • Drag the midpoint to change the gradient progression
      
    • Change the blend function in the on-canvas dialog