https://bugs.kde.org/show_bug.cgi?id=437429
Bug ID: 437429
Summary: Broken color display in the Palette docker with an
active OCIO config
Product: krita
Version: nightly build (please specify the git hash!)
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Color models
Assignee: krita-bugs-n...@kde.org
Reporter: manuel.snudl.zeid...@gmail.com
Target Milestone: ---
Created attachment 138626
--> https://bugs.kde.org/attachment.cgi?id=138626&action=edit
HDR palette
SUMMARY
I'm noticing that the display of color spots, including floating-point HDR
colors, in the Palette docker look very different in the Krita 5 prealpha
AppImage compared to Krita 4.4.3, if 1. the document is not in linear sRGB, and
2. a working OCIO config is active in the LUT management docker.
I make sure that the color space of the document and the input space in the
OCIO config match exactly. In Krita 4.4.3 the palette colors look correct and
consistent with every color space that I can find a match for, but Krita 5 only
displays them right if the document and OCIO input are (linear gamma) sRGB.
The palette color in this case also doesn't match the Specific Color Selector,
nor the resulting color on canvas.
I always start Krita with LC_ALL=C to avoid the number formatting issue in the
OCIO LUTs.
STEPS TO REPRODUCE
1. Create or open a document in 16- or 32-bit floating-point, linear sRGB
2. Add an OCIO config like Filmic or ACES in the LUT docker and set the input
and display settings correctly
3. Use colors picked from a palette in the Palette docker on canvas and compare
their look
4. Convert the document color space to a wide gamut like ACEScg, update the
OCIO input space to match it, and compare again
OBSERVED RESULT
Color spots are not representative of the resulting color on canvas. Even super
bright color spots (at float value 16.29 in any channel) appear dimmed in terms
of display brightness.
EXPECTED RESULT
Color spots should match the look on canvas and in the Specific Color Selector
like is the case in Krita 4.4.3.
SOFTWARE/OS VERSIONS
Tested in the 5.0.0-prealpha (git 3d23ca9) AppImage.
ADDITIONAL INFORMATION
If the OCIO configs I tested with are needed:
Filmic - https://github.com/sobotka/filmic-blender
ACES - https://github.com/sobotka/ACES-1.2-Displays-Formatted
The ACES download is very large because it includes a ton of baked LUTs and ICC
profiles. ACES has a lot of input colorspaces and display output options if
needed, including HDR10 / HLG display targets.
I'll attach the HDR palette I used, which was created by Wolthera, if I'm not
mistaken.
--
You are receiving this mail because:
You are watching all bug changes.
