Hi
I tested most of the propositions but as explain by Jsmack most of the solution work only with a single object. Otherwise the faces of different sizes will have different widths/thickness.
I'm still looking for a solution to get a Wireframe that's working with "complex" assets.
If someone got another idea for my needs. It will be really appreciate
Found 6 posts.
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Solaris and Karma » Wireframe Shader inside Karma MaterialX Subnet?
- Tukifri
- 6 posts
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Solaris and Karma » Karma XPU Artifacts with 4090?
- Tukifri
- 6 posts
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Hi
I have the same issues with my 2080, I thought that a new Gpu (4090) will fix the problem but as I read your post it will not..
I tested to add this envvars.
KARMA_XPU_OPTIX_SPARSE_TEXTURES = 0
It fixed the issues but Optix doesn't start (initializing) so very poor performance
I tried also with this 3 envvars. Same result
KARMA_XPU_OPTIX_SPARSE_TEXTURES=0 (default is 1)
KARMA_XPU_OPTIX_HQ_LINEAR_FILTERING=1 (default is 0)
KARMA_XPU_DISABLE_MIPMAPS=1 (default is 0)
Is there any other solutions to fix it?
Thanks
I have the same issues with my 2080, I thought that a new Gpu (4090) will fix the problem but as I read your post it will not..
I tested to add this envvars.
KARMA_XPU_OPTIX_SPARSE_TEXTURES = 0
It fixed the issues but Optix doesn't start (initializing) so very poor performance
I tried also with this 3 envvars. Same result
KARMA_XPU_OPTIX_SPARSE_TEXTURES=0 (default is 1)
KARMA_XPU_OPTIX_HQ_LINEAR_FILTERING=1 (default is 0)
KARMA_XPU_DISABLE_MIPMAPS=1 (default is 0)
Is there any other solutions to fix it?
Thanks
Solaris and Karma » Artifacts appears in Houdini XPU - UDIM Issues
- Tukifri
- 6 posts
- Offline
Pretty weird bug to reproduce.. So I did a simple scene with a mesh from kitbash. I only connected a normal-map texture.
When I used <UDIM> the artifacts appear in XPU. NB: The textures for the tests are not related to the mesh but I got the same bug with my working mesh that have correct UVs and UDIMS.
I did the test with a folder of 80 maps(normal)and the bug appear but when I connect half of the textures, there's no bug anymore.. The bug also disappear when I reduce the mesh polygon by deleting half of the mesh for example.
I did some tests with .abc and .fbx and it's the same issues
When I used <UDIM> the artifacts appear in XPU. NB: The textures for the tests are not related to the mesh but I got the same bug with my working mesh that have correct UVs and UDIMS.
I did the test with a folder of 80 maps(normal)and the bug appear but when I connect half of the textures, there's no bug anymore.. The bug also disappear when I reduce the mesh polygon by deleting half of the mesh for example.
I did some tests with .abc and .fbx and it's the same issues
Solaris and Karma » Artifacts appears in Houdini XPU - UDIM Issues
- Tukifri
- 6 posts
- Offline
Hi,
I got an issue when I render with XPU that seems to be related to udims.
On huge assets(building) it seems that the UDIM workflow doesn't work properly and break the render with some artifacts.
The asset has a mtlxStandardSurface and everything is working fine in houdini GL or CPU but as soon I used XPU render, the mesh disappears and create some artifacts in all the scene.
After some tests it seems to be a UDIM problem as it only happen when I used <UDIM> token in my texture path otherwise if I used the texture path "1001" the XPU work correctly.
I'm not seeing any errors in the logs.
Is there any solution or update that would fix that issue?
I got an issue when I render with XPU that seems to be related to udims.
On huge assets(building) it seems that the UDIM workflow doesn't work properly and break the render with some artifacts.
The asset has a mtlxStandardSurface and everything is working fine in houdini GL or CPU but as soon I used XPU render, the mesh disappears and create some artifacts in all the scene.
After some tests it seems to be a UDIM problem as it only happen when I used <UDIM> token in my texture path otherwise if I used the texture path "1001" the XPU work correctly.
I'm not seeing any errors in the logs.
Is there any solution or update that would fix that issue?
Edited by Tukifri - May 1, 2024 09:14:12
Solaris and Karma » Houdini 20 - OCIO - ACES 1.2
- Tukifri
- 6 posts
- Offline
Hi,
In Houdini 19.5, I set up the OCIO with the ACES 1.2 to houdini.env. I saw the correct OCIO 1.2 config file loaded in Edit>Color_settings>Color_correction and I saw in Render View in Color Correction bar that ACES + sRGB is being used. Everything was working properly.
In houdini 20, If I set up the same way, that doesn't work. The previous render in the gallery and the new one are wrong and didn't match the colorspace that I have with aces 1.2 in houdini 19.5
Whatever I do in the new OCIO editor that doesn't fix it. even when I changed exr colorspace to ACEScg to fix the snapshot that doesn't work.
So how can I fix the gallery snapchot with the correct colorspace to have the same render saved in the 19.5 and 20 and how to add the ACES 1.2 properly on in the new OCIO setting ?
Thanks in advance
In Houdini 19.5, I set up the OCIO with the ACES 1.2 to houdini.env. I saw the correct OCIO 1.2 config file loaded in Edit>Color_settings>Color_correction and I saw in Render View in Color Correction bar that ACES + sRGB is being used. Everything was working properly.
In houdini 20, If I set up the same way, that doesn't work. The previous render in the gallery and the new one are wrong and didn't match the colorspace that I have with aces 1.2 in houdini 19.5
Whatever I do in the new OCIO editor that doesn't fix it. even when I changed exr colorspace to ACEScg to fix the snapshot that doesn't work.
So how can I fix the gallery snapchot with the correct colorspace to have the same render saved in the 19.5 and 20 and how to add the ACES 1.2 properly on in the new OCIO setting ?
Thanks in advance
Solaris and Karma » CPU/XPU differences with MtlX Standard Surface
- Tukifri
- 6 posts
- Offline
Hi
I am wondering if there is a fix for this issue.
I'm also doing some Karma tests with MaterialX shaders and I get the same issues. The XPU render is darker than the CPU.
I used the Houdini 19.5.569
At first, I thought it was my roughness map. But the map is a EXR set in float. I also checked the name of the map, the light(hdri), I hide the backdrop thinking maybe the reflection of the environment doesn't works in XPU, etc,
Whatever I do even with a MtlX Standard Surface without any maps connected to it the issues appear.
The blue render is just the difference between CPU and XPU with a basic materialX and the other one is the AOV(combined glossy reflection)
I am wondering if there is a fix for this issue.
I'm also doing some Karma tests with MaterialX shaders and I get the same issues. The XPU render is darker than the CPU.
I used the Houdini 19.5.569
At first, I thought it was my roughness map. But the map is a EXR set in float. I also checked the name of the map, the light(hdri), I hide the backdrop thinking maybe the reflection of the environment doesn't works in XPU, etc,
Whatever I do even with a MtlX Standard Surface without any maps connected to it the issues appear.
The blue render is just the difference between CPU and XPU with a basic materialX and the other one is the AOV(combined glossy reflection)
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