BUG: Conversion to greyscale with merged layers and selection of "master" channel results in super high contrast

  • 1
  • Problem
  • Updated 10 months ago
  • (Edited)

When trying to convert RGB or CMYK to grey scale with merged layers, wether from the pop up during conversion, the layer option to merge layer or flattened image, will result in a super high contrast image with mostly eighter white or black and the smallest amount of gey 50%.

The same occures (inverted) when recovering selection of the "master" channel (CMYK or RGB).

I've tried: going back to versions 20.05 and 19.1.9 (wich reset my preferences anyways_, booting in safe mode. I wasn't able to make the conversion. 

This issue was recreated on a second computer, both running windows 10, but completely different CPU, one is a 5 years old Thinkpad (don't have the specs with me) and one is self built with the following components:


  • Operating System Windows 10 Professionnel 64-bit
  • CPU AMD Ryzen 1950X
  • RAM CORSAIR Vengeance LPX 32GB 32,0 Go
  • Motherboard Gigabyte Technology Co. Ltd. X399 AORUS PRO-CF (SP3r2)
  • Graphics NVIDIA GeForce GTX 1060 6GB (ZOTAC International)
  • Storage 465GB Samsung SSD 970 EVO 500GB (Unknown (SSD))
The bug couldn't be recreated on another computer at my jobs office.

Finaly here's a video depicting the issue (french menus):


Photo of Samuel Charpentier

Samuel Charpentier

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  • very frustrated

Posted 10 months ago

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