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Posted (edited)

Hi,

on Windows, with OpenCL active.

the gradient map ignores alpha.

Until 1.9.2.1035, a gradient map only affected pixels with alpha >0. On a transparent background, nothing changed.

Starting with Beta 1.9.4.1048, the gradient map changes all pixels, even where alpha is zero.

This is either a bug, or a change of functionality which totally brakes backward compatibility.

If you suspect the OpenCL driver: On the same PC, 1.9.2. does not shows this issue, with OpenCL active.

462.31 (as of 2021-04-12) latest available "studio" driver

Regards,

Timo

image.png.f480cf2bf265960c81c3ba0f04580416.png

1.9.4.1048 beta gradient map.afphoto

Edited by NotMyFault
added GPU driver details

Mac mini M1 A2348 | MBP M3 

Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.

 

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