Wed Oct 19, 2022 9:00 am
Wed Oct 19, 2022 9:47 am
Wed Oct 19, 2022 11:16 am
ofnuts wrote:How do you define 80% gray?
ofnuts wrote:Create two images, one 8-bit integer perceptual (the usual 2.8 kind), one 32-bit FP linear...
What is displayed is always perceptual. But in the normal case, Gimp will work on linear values, so what you get is gamma[1-reverse_gamma(gray)], while in legacy it works on the gamma values directly (as it did in 2.8) you get [1-gray].
Wed Oct 19, 2022 4:21 pm
Thu Oct 20, 2022 10:18 am
ofnuts wrote:...
With the image above on your screen, step back...
ofnuts wrote:So, legacy mode is the one where you can compute things easily, and the one you are used to, but it is not the one with correct results.
(*) to be fair, this depends a bit on the gamma rendering of your display. ...
Thu Oct 20, 2022 12:33 pm
gramp wrote:I'm using GIMP to create heightmaps for CNC models.
Thu Oct 20, 2022 1:25 pm
ofnuts wrote:gramp wrote:I'm using GIMP to create heightmaps for CNC models.
So you are basically using Gimp to do math, which is not something it was designed for.
ofnuts wrote:This said, did you try to work in 8-bit linear mode (and using default blend modes?)
Fri Oct 21, 2022 7:07 am
Fri Oct 21, 2022 10:07 am