Incorrect text color when using opacity

[Floor]

Not sure if I'm doing something wrong here, but it looks like text color is rendered incorrectly when setting opacity < 100% on a text layer. Opacity seems to be calculated correctly when making a parent group transparent.

Attached a simple test case:

1. no background - layers 50% opacity - ok
2. no background - group 50% opacity - ok
3. white background - layers 50% opacity - incorrect?
4. white background - group 50% opacity - ok

All fill colors are set to black so I expect 50% opacity to become rgb(128,128,128). However the color of the text becomes rgb(161,161,161) when using 50% opacity.

 

Affinity Designer 2.5.3 - macOS Sonoma 14.5

text-opacity.afdesign

[carl123]

It's related to the blend gamma set for text which is 1.45 all other objects are set to 2.2

Blend gamma is set in Edit > Settings > Tools

If you set it to 2.2 you will see the results you were expecting

I don't know why that setting is configurable or why it is set to 1.45 so probably best to wait to see if someone can explain what it does before arbitrarily changing it

[Floor]

17 minutes ago, carl123 said:

It's related to the blend gamma set for text which is 1.45 all other objects are set to 2.2

Blend gamma is set in Edit > Settings > Tools

If you set it to 2.2 you will see the results you were expecting

I don't know why that setting is configurable or why it is set to 1.45 so probably best to wait to see if someone can explain what it does before arbitrarily changing it

Ahh thanks for the info! Wasn't aware of the different default gamma values, unexpected but interesting. Cheers!