10-03-2018, 11:30 PM

I have some questions about linear workspace.

I followed the instructions here and determined that Gimp 2.10 does indeed use linear calculations:

https://ninedegreesbelow.com/photography...ssing.html

That's great! I already knew this, sort of, but I have some issues understanding what is going on.

These tests work in both perceptual sRGB and Linear light. What happens when I change the precision to 'linear light'? Is it something that becomes embedded in any file I export? I have also noticed that bit depth makes no difference, so why would I need to change it to higher than 8 bits if I just want correct linear maths?

Why does every guide I read about linear light insist that more than 8 bits are needed if I want to use linear light calculations? Obviously this is not a strict requirement if Gimp can do linear calculations in perceptual sRGB and 8 bit.

I followed the instructions here and determined that Gimp 2.10 does indeed use linear calculations:

https://ninedegreesbelow.com/photography...ssing.html

That's great! I already knew this, sort of, but I have some issues understanding what is going on.

These tests work in both perceptual sRGB and Linear light. What happens when I change the precision to 'linear light'? Is it something that becomes embedded in any file I export? I have also noticed that bit depth makes no difference, so why would I need to change it to higher than 8 bits if I just want correct linear maths?

Why does every guide I read about linear light insist that more than 8 bits are needed if I want to use linear light calculations? Obviously this is not a strict requirement if Gimp can do linear calculations in perceptual sRGB and 8 bit.