It's probably a bit confusing when trying this for the first time.
You create the Karma Physical Lens not in a material library, but a Material Network.
So put down a material network on /stage or in your lopnet, dive inside, and then you can find it in the Tab-menu.
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Houdini Indie and Apprentice » cant find Physical Lens Shader node
- protozoan
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Solaris and Karma » XPU stopped working after Houdini upgrade (605 to 653).
- protozoan
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I can reproduce some sort of problem.
When using XPU in .653 using nvidia 550.54.14 on Linux (not debian though), I get 100% embree only, no optix.
It renders, just CPU-only. So there is something up.
When using XPU in .653 using nvidia 550.54.14 on Linux (not debian though), I get 100% embree only, no optix.
It renders, just CPU-only. So there is something up.
Technical Discussion » How to make a clean uv grid out of this?
- protozoan
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If (only if, though) your ordering is guaranteed, you can treat it as a mesh. ConvertSOP set to mesh, then a UvtextureSOP with the type parameter set to "Rows & Columns", then ConvertSOP back to polygons.
This should do it, for this special case.
This should do it, for this special case.
Solaris and Karma » Geometry Clip Sequence Lop or how to handle large data
- protozoan
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luijee
Does this workflow support a sequence of vdbs?
For volume data you may want to check out the VolumeLOP.
Solaris and Karma » Karma sampling Pixel Oracle?
- protozoan
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In H20, open a lopnet, put down a "Karma" (that creates a Karma rendersettings lop and a USD render ROP), on the Karma rendersettings LOP go to the Advanced Tab and there the Sampling sub-tab. There you will find the settings.
Note: This is KarmaCPU only. KarmaXPU does not have this.
Note: This is KarmaCPU only. KarmaXPU does not have this.
Solaris and Karma » Karma rendering VFB (Visual Frame Buffer)
- protozoan
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I have always been a rather vocal apologist of the "framebuffer" workflow a la mplay.
Since H20's render gallery, I switched my workflow over to it, it's really working quite well.
Since H20's render gallery, I switched my workflow over to it, it's really working quite well.
Technical Discussion » Where are the 11.2 gcc versions of Houdini 20.0.58x?
- protozoan
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The 11.2 builds bombing has been going on for a while now, even over the holidays. Since occasionally one pops up, I guess it's not an issue of "we forgot to turn them back on" but rather something technical that will be worked out
Technical Discussion » How to create float parameter without the "slider" UI
- protozoan
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It's in the tags.. add a tag, choose from "built in tags", down in the list somewhere you will find "No Slider", then it's gone.
Solaris and Karma » exit color om refraction
- protozoan
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jsmack
but it always looked fake
Sometimes it's good enough, tbh..
I wouldn't have anything against them bringing back vm_raylimiteval. While we're making Christmas wishes I would even prefer it to be a per-material setting rather than global, with a user definable background per material
Technical Discussion » error 500
- protozoan
- 1631 posts
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It's not just you, seems to be down for everyone.
Got to wait a bit until the Toronto office wakes up
Got to wait a bit until the Toronto office wakes up
Solaris and Karma » HDR size in Dome light
- protozoan
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Take this with a grain of salt, as my wisdom is limited.
You won't see changes in specular reflection from that setting, but rather on the diffuse side.
It's there to filter out high frequency pings in the map that would result in noise.
You can try the following, to see a visible result. Take your sphere, kill the specular reflection from the shader, and use
as your map. The light there comes largely from a small sun disc. If you decrease the maximum size now to something ridiculous like "5" or so, the sampling will miss the sun and the scene turns blue.
You won't see changes in specular reflection from that setting, but rather on the diffuse side.
It's there to filter out high frequency pings in the map that would result in noise.
You can try the following, to see a visible result. Take your sphere, kill the specular reflection from the shader, and use
$HFS/houdini/pic/hdri/HDRIHaven_kiara_5_noon_2k.rat
as your map. The light there comes largely from a small sun disc. If you decrease the maximum size now to something ridiculous like "5" or so, the sampling will miss the sun and the scene turns blue.
Solaris and Karma » Geometry Clip Sequence Lop or how to handle large data
- protozoan
- 1631 posts
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tamte
Why would it need to load any file to memory?
It used to be like that, but that was a long time ago and now should not be necessary anymore. The value clip generation should zing just through, even for large datasets.
robp: A lot of people seem to struggle with this. Maybe this warrants a case-study tutorial like "Solarifying production caches efficiently from start to finish" without skipping any checkboxes etc.
Edited by protozoan - Dec. 8, 2023 10:48:06
Technical Discussion » Auto retopology quad remesh
- protozoan
- 1631 posts
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If you have access to Houdini 20, you can try the new quadremesh sop. (It's still in its infancy, but works for organic surfaces).
Other than that: Exoside.
Other than that: Exoside.
Solaris and Karma » Houdini 20 Solaris / Karma thoughts
- protozoan
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davpe
Why is it not possible to run renders from render gallery window (using existing camera)?
I may be completely misunderstanding what this is about, but in H20, the render gallery should have this functionality.
- You create a render gallery window
- Press on that "Background" button to start a render. Down below in the gallery strip a new thumbnail appears with the developing rendering.
- Click on the thumbnail while the render is still churning. You see a view similar to mplay in the elder days above the thumbnail strip, with the rendering progressing.
- You can pop out the new render stats, zoom the picture, use the inspector, all while the rendering is running. I basically have replaced my classic workflow with this.
Is this not what you are suggesting?
Houdini Lounge » H20 - hidden gems - post them here
- protozoan
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For me one of the underrated gems are the timeline bookmarks. This may be irrelevant for some fx shots that are like 60 frames long, but for long takes with lots of stuff going on, it's a very useful thing, especially when changes occur.
Solaris and Karma » Camera metadata in Karma render
- protozoan
- 1631 posts
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There's a tutorial for adding arbitrary metadata to your exr outputs, check this out (note: you need to read the very bottom of the page, where it says "19.5 upgrade"):
https://noahhaehnel.com/blog/custom-metadata-in-solaris/ [noahhaehnel.com]
https://noahhaehnel.com/blog/custom-metadata-in-solaris/ [noahhaehnel.com]
Solaris and Karma » Karma XPU feels really slow!
- protozoan
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jsmack
as they have an added cost
The topic of costs will lead to some interesting discussion, once Karma goes full commercial and costs per seat (that mantra deal was always really great in that regard, especially for shops strapped for cash but still with some racks full of nodes, like ours).
Houdini Indie and Apprentice » Karma XPU issue
- protozoan
- 1631 posts
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Yes, I think the minimum for XPU to work on the GPU side is a Turing-generation card (20xx).
Houdini Indie and Apprentice » Karma XPU issue
- protozoan
- 1631 posts
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My guess is: the GPU is too old (the hardware itself, not the driver), so KarmaXPU runs only on the cpu-side.
Houdini Lounge » H20 question - could someone describe the advantages of APEX system?
- protozoan
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LukeP
Are SESI and SideFX one and the same?
Yes, SESI is just "Side Effects Software Inc.".
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