Hello there,
just realized that the OCIO color transform is not working in my karma mtlx subnet.
Its it broken or am i doing something wrong ?
Exported the same texture in different colorspaces, but dont see an influence by switching the from and to space of the texture.
working in a ocio environment.
Cheers,
Daniel
Karma Ocio Color Transform not working
2383 6 1- Crustedink
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- jsmack
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- Crustedink
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jsmackoh noes, thanks for the clarification. so xpu is ignoring this node and the colorspace extension on the file name ? not good.
It doesn't work in Karma XPU.
just did a test with cpu and everything is fine. is there a list somewhere with nodes that are not yet working with xpu?
struggling to get a 8bit png from karma that looks like a proper acescg to srgb conversion. in all my test the conversion didnt compensate the different primaries in srgb and aces and the colors where off. i not that rendering to 8bit srgb is stupid, but on this project its needed
- ajz3d
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CrustedinkYou can find some information about the current state of Karma XPU and how it compares feature-wise to CPU version here [www.sidefx.com] and here [www.sidefx.com].
is there a list somewhere with nodes that are not yet working with xpu?
CrustedinkYou can render to 32-bit EXR in ACEScg space and then batch convert the sequence to 8-bit sRGB either with
struggling to get a 8bit png from karma that looks like a proper acescg to srgb conversion. in all my test the conversion didnt compensate the different primaries in srgb and aces and the colors where off. i not that rendering to 8bit srgb is stupid, but on this project its needed.
ocioconvert
or hoiiotool
. The former ships with opencolorio-tools
, the latter with Houdini. Or do the conversion in COPs.
Edited by ajz3d - Jan. 24, 2023 11:15:13
- jsmack
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Crustedink
oh noes, thanks for the clarification. so xpu is ignoring this node and the colorspace extension on the file name ? not good.
Colorspace file name tokens should work in Karma XPU and CPU. You may need to change environment variables if you are relying on aliases or file name rules in an ocio 2.0+ profile.
Beware PNGs, they often store the color data unpremultiplied, and software like Houdini assumes that they are by premultiplying. There are some additional env vars to control this behavior globally. oiiotool also follows this spec with some command line arguments to disable it.
- Crustedink
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- jsmack
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