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I have been using Affinity Photo for well over a year since I left Adobe Photoshop when they changed their business model and overall I am delighted. I have just experienced a problem with my normal sharpening routine on the High Pass Filter.

 

My routine is:

 

  1. Choose Layer, New Live Filter Layer, High Pass Filter
  2. In Dialogue box check monochrome
  3. Drag radius slider UP until level of detail to be sharpened becomes visible
  4. Get rid of dialogue box
  5. Select  High Pass Filter Layer
  6. Set Blend Mode to Linear Light
  7. Choose Layer, Invert
  8. With High Pass Filter Layer selected use the Paint Brush tool, take hardness down all the way, increase the brush size and then, in the colour tab, make sure colour set to white.
  9. With Paint brush, Click Drag to paint in the sharpening on the areas you want to sharpen

 

 

 

 

 

 

 

 

This routine has worked faultlessly until yesterday when it stopped. Normally, as you brush over the detail you want to sharpen you can see the effect as you brush but not now.

 

I should stress that in all other respects (layers, filters, masks etc) Affinity Photo is working fine. In particular the Unsharp Mask filter is working fine.I suspect therefore the fault  I have with the High Pass Filter may be something I have done rather than with Affinity.

 

Any ideas? I would be very grateful for any help.

 

Bail

 

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Hi Bail,

Welcome to Affinity Forums :)

Please check if the opacity of the Paint Brush Tool is set to 0%. Also make sure you have the adjustment layer selected (highlighted) in the Layers panel.

Without seeing the file it's difficult to guess what may be causing this. Any chance you can upload it so we can check it out?

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Hi MEB

 

Many thanks your suggestions. I checked out both the brush opacity and the layer selection and both were fine.

 

Then I noticed I had Protect Alpha checked. As soon as I unchecked this, all is working fine. I don't really understand the Protect Alpha bit so I don't know how I had come mistakenly to check it.

 

Any way, you solved my problem, thank you.

 

All best wishes,

 

David

 

PS No point in uploading a file as High Pass inoperative with all the ones I tried!

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