The Hair Particles interprets the color from the newer vertex domain and float color types wrong #100900

New Issue

Ramesh · 2022-09-08T07:16:30+02:00

Ramesh commented

2022-09-08 07:16:30 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: 0759f671ce
Worked: (newest version of Blender that worked as expected)

Short description of error
I am trying to modify hair color using color attribute (called as vertex color in previous versions). But hair particles simply ignores the color attribute. I just plugged in a musgrave texture and that works as expected but color attribute does not. I have attached a screenshot for a better understanding.

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15 **Blender Version** Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: `0759f671ce` Worked: (newest version of Blender that worked as expected) **Short description of error** I am trying to modify hair color using color attribute (called as vertex color in previous versions). But hair particles simply ignores the color attribute. I just plugged in a musgrave texture and that works as expected but color attribute does not. I have attached a screenshot for a better understanding. ![Clr_Attr.jpg](https://archive.blender.org/developer/F13467057/Clr_Attr.jpg)

Ramesh commented

2022-09-08 07:16:30 +02:00

Added subscriber: @grneo

Philipp Oeser commented

2022-09-08 10:52:24 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-09-08 10:52:24 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Philipp Oeser commented

2022-09-08 10:52:24 +02:00

This seems to work on my side:

#100900.blend

@grneo : does above file work for you?
If so, please share the .blend file that fails on your side so we can try to reproduce

This seems to work on my side: ![image.png](https://archive.blender.org/developer/F13467582/image.png) [#100900.blend](https://archive.blender.org/developer/F13467584/T100900.blend) @grneo : does above file work for you? If so, please share the .blend file that fails on your side so we can try to reproduce

Ramesh commented

2022-09-09 18:39:58 +02:00

@lichtwerk Ah! yes. The file works. I also found that when we create a color attribute it has to be set as Face Corner > Byte Color. Rest does not work. I don't know the reason. Please explain if you know. I am sharing your .blend file with other color attributes that I tried. Thank you.

#100900.blend

@lichtwerk Ah! yes. The file works. I also found that when we create a color attribute it has to be set as Face Corner > Byte Color. Rest does not work. I don't know the reason. Please explain if you know. I am sharing your .blend file with other color attributes that I tried. Thank you. [#100900.blend](https://archive.blender.org/developer/F13473175/T100900.blend)

Hans Goudey commented

2022-09-09 19:03:30 +02:00

Added subscriber: @HooglyBoogly

Hans Goudey commented

2022-09-09 19:03:30 +02:00

That's right, the old particle system doesn't support the newer vertex domain and float color types. Since the particle system is actively being replaced (#68981), that isn't a priority currently.

Philipp Oeser commented

2022-09-28 09:37:09 +02:00

Changed status from 'Needs User Info' to: 'Confirmed'

Philipp Oeser commented

2022-09-28 09:37:09 +02:00

Will confirm still, but with low prio (because of the replacement of the old hair system)

Philipp Oeser changed title from ~~The Hair Particles ignores the color from the color attributes~~ to The Hair Particles interprets the color from the newer vertex domain and float color types wrong

2022-09-28 09:38:21 +02:00

Philipp Oeser removed the

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The Hair Particles interprets the color from the newer vertex domain and float color types wrong #100900