Radial&Linear gradient mask issue when used over a keystone corrected image

Ramon Mata

• June 18, 2022 07:18
• Edited

Are you affected by this issue too?
Happens to me with HW acceleration enabled and disabled too.

 

Steps to reproduce:

• Edit one of your raw files
• Apply a keystone correction
• Add a new layer and draw a radial mask in the center, keeping press the shift key so the mask is a perfect circle

Notice in the attached image, the radial mask is deformed, an oval shape, the lines at the top have more space between than the ones bottom.

Seems the keystone correction affects the creation of the mask.

Similar thing happens with the Linear mask, you press shift in order to make it perfectly horizontal, but if the keystone tool rotates your image it will not make your radial correctly.

btw, I have already reported this to C1.

 

regards!

2

• 

  Ian Wilson

  Moderator

  • June 18, 2022 08:59

  

  Yes, I think it has always been like this. The gradient and radial masks work in relation to the geometry of the original image. Which is a better approach (basing it on the original geometry or on the corrected geometry) probably depends on the reasons why you want to apply the graduated mask to the image, which may vary from one picture to another.

  Ian

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• 

  Propheticus

  • August 15, 2022 08:10
  • Edited

  I think its most obvious that when you draw a circle instead of an oval, that you intend to have a circle.
  Drawing a circle which then *poof* transforms itself into an oval is not intuitive (what you see is not what you get).

  It does make sense to me when you drew the circle mask befóre you keystone corrected, this then gets keystoned along with the rest. 

  Also, you keystone to correct/straighten out (geometric) elements in your picture. If I then draw a linear gradient, I don't want the result to be curved but straight to match the now straightened out lines! 

  Example, after keystone correction it's impossible to draw a parallel linear gradient (used a yellow grid to make it even more obvious):
  

  (The same happens with lens distortion correction by the way.)

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  Thomas Kyhn

  • August 15, 2023 11:08

  

  I've made a request for this issue to be fixed: Gradient masks after keystone adjustments.

  0

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