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Solaris and Karma » Displacement Splitting geo
- Siavash Tehrani
- 710 posts
- Online
Instead of splitting the mesh into different prims you could use your groups to set up Geometry Subsets. That way you maintain a continuous mesh, but have separate prims underneath to apply materials to.
Technical Discussion » Enabling Caustics with XPU
- Siavash Tehrani
- 710 posts
- Online
tamtetbay312
if you want to have real fun though, load your scene in Omniverse, turn on iRay's Caustic Sampler and watch your detailed caustics appear almost real time, it feels like magic
That sounds lovely. Can we get that SideFX?
Meanwhile the caustics at home. 10,000 samples with XPU and optix denoiser. I'll have to try CPU with path guiding.
Btw Tyler, if you are doing any sort of comparisons with refractive surfaces, one thing to watch out for is the Enable Internal Reflections setting in H20: https://www.sidefx.com/forum/topic/93357/ [www.sidefx.com]
Edited by Siavash Tehrani - Feb. 16, 2024 19:27:38
Solaris and Karma » Disappointing Layout Editing
- Siavash Tehrani
- 710 posts
- Online
That reminds me of an RFE I submitted in late 2022...
Hello SideFX team, it would be great to see faster manipulation of assets brought in via the Stage Manager LOP. What I would like to do: Bring in a model, place it, bring in another model, place it and make adjustments to both, place another model, make further tweaks to all three, bring in some more etc etc. The issue is that the Stage Manager LOP doesn't let you select a different prim in the viewport without first explicitly hitting the 'S' selection shortcut, and then Enter to bring the transform handle back up. This results in extra clicks when making layout adjustments and slows down workflow. If you select prims in the SGT, the transform handle automatically switches to the newly selected prim, or you can click the handle gizmo icon in the Stage Manager's QT panel. Neither of these are fast selection methods and I would consider it bad UX for doing quick layout edits. We also don't seem to have the ability to manipulate more than one prim at a time, which is another workflow killer when populating a scene with the Stage Manager. The Edit LOP handles these sort of quick edits much better, it would be nice if the Stage Manger could match that behavior. Thank you.
Solaris and Karma » [SOLVED] Differences in reflection/refraction between H19.5 and H20
- Siavash Tehrani
- 710 posts
- Online
Thanks everyone, "Enable Internal Reflection" did the trick! I was not aware of that parameter in H20.
I'd agree that it should be enabled by default. Too easy to miss, and the differences in the look are massive.
I'd agree that it should be enabled by default. Too easy to miss, and the differences in the look are massive.
Solaris and Karma » [SOLVED] Differences in reflection/refraction between H19.5 and H20
- Siavash Tehrani
- 710 posts
- Online
Thanks for the suggestion jsmack. There is no visual difference when unclamping the color limit in this scene.
Solaris and Karma » [SOLVED] Differences in reflection/refraction between H19.5 and H20
- Siavash Tehrani
- 710 posts
- Online
Bumping this with another example. Subjectively I feel like the H20 render is a downgrade, but I'm more concerned with physical accuracy. Is there some kind of optimization going on in H20 that's causing the different look?
19.5.733 vs 20.0.547
Karma XPU (but the results are the same with CPU)
Reflect/refract limits have been bumped to 50.
Scene files are attached if anyone wants to poke around.
Thanks.
19.5.733 vs 20.0.547
Karma XPU (but the results are the same with CPU)
Reflect/refract limits have been bumped to 50.
Scene files are attached if anyone wants to poke around.
Thanks.
Houdini Lounge » using different uv attribute name in mtlx ?
- Siavash Tehrani
- 710 posts
- Online
There are a few nodes for bringing in specific attributes/primvars such as MtlX Texture Coordinates or MtlX Geometry Color, but you can always just use MtlX Geometry Property Value instead. Use it to bring in uv2 or whatever it's called and set the signature to Vector 2 if you would like.
Houdini Lounge » Odd behavior with Karma CPU
- Siavash Tehrani
- 710 posts
- Online
Interesting. Other issues I've come across with procedural pattern normals and Karma CPU are faceting, harsh shadow terminators with high-frequency noises, and artifacts where Rounded Edges does its thing.
We have a ticket in with support, hopefully they can sort it out.
We have a ticket in with support, hopefully they can sort it out.
Houdini Lounge » Odd behavior with Karma CPU
- Siavash Tehrani
- 710 posts
- Online
We are seeing similar issues where Karma CPU has difficulties with normal "maps" generated from procedural patterns. Please see the example below: CAD file, normals driven by MaterialX procedural noises. Karma CPU has artifacts that line up with the model's topology, whereas XPU handles it fine. I will submit an official bug report as well.
The color difference is a separate problem that cropped up with H20, but I'll have to dig a little deeper on that.
The color difference is a separate problem that cropped up with H20, but I'll have to dig a little deeper on that.
Technical Discussion » Control handle when working with points in the curve node.
- Siavash Tehrani
- 710 posts
- Online
Hit 'o' to enter orient mode and Shift+LMB or MMB on a control point to toggle the orient handle.
Technical Discussion » Karma render stuck
- Siavash Tehrani
- 710 posts
- Online
Solaris and Karma » Houdini Indie 20, cant seem to render out AOVs ?
- Siavash Tehrani
- 710 posts
- Online
When you say you're only getting Beauty, do you mean only one file? If so, that is the standard behavior. Karma will output multi-channel exrs that contain all your AOVs. If you load up your exr in mplay you should be able to see all your AOVs in the dropdown menu.
If you want a separate exr for each AOV there is a little bit of extra setup involved. One of the devs posted an example file in this thread: https://www.sidefx.com/forum/topic/88804/#post-383694 [www.sidefx.com]
If you want a separate exr for each AOV there is a little bit of extra setup involved. One of the devs posted an example file in this thread: https://www.sidefx.com/forum/topic/88804/#post-383694 [www.sidefx.com]
Solaris and Karma » Split SSS per LPE
- Siavash Tehrani
- 710 posts
- Online
Solaris and Karma » [SOLVED] Differences in reflection/refraction between H19.5 and H20
- Siavash Tehrani
- 710 posts
- Online
Hi all,
I was updating a scene from H19.5 to H20 and noticed some significant differences in how Karma is treating reflections/refraction. Has anyone else encountered this?
I was updating a scene from H19.5 to H20 and noticed some significant differences in how Karma is treating reflections/refraction. Has anyone else encountered this?
Edited by Siavash Tehrani - Dec. 24, 2023 09:35:56
Houdini Lounge » 3D Connextion space mouse with Houdini
- Siavash Tehrani
- 710 posts
- Online
Thank you. I added spacenavigator.py. It then complained about missing pywinusb, so I installed it via pip, following Paul Ambrosiussen's handy tutorial here: https://youtu.be/cIEN50WuPoc?si=t-aXG4CZSOElqaBV [youtu.be]
The panel now loads without errors, however while the buttons on the spacemouse still work fine, no inputs from the puck seem to be detected.
The panel now loads without errors, however while the buttons on the spacemouse still work fine, no inputs from the puck seem to be detected.
Houdini Lounge » 3D Connextion space mouse with Houdini
- Siavash Tehrani
- 710 posts
- Online
Thanks so much for sharing this Jonathan! I get the following error when trying to access the panel:
There is an error in the SpaceMouse script.
Traceback (most recent call last):
File "C:/Users/hibbi/Documents/houdini19.5/python_panels/SpaceMouse.pypanel", line 18, in <module>
#
File "C:\Program Files\Side Effects Software\Houdini 19.5.773\python39\lib\site-packages-forced\shiboken2\files.dir\shibokensupport\__feature__.py", line 142, in _import
return original_import(name, *args, **kwargs)
ModuleNotFoundError: No module named 'spacenavigator'
Houdini Indie and Apprentice » select tree
- Siavash Tehrani
- 710 posts
- Online
When you right-click on a node, there will be an Inputs and/or Outputs submenu which will let you select the parents or children.
Technical Discussion » Viewing groups simultaneously?
- Siavash Tehrani
- 710 posts
- Online
Make sure you select Groups from that dropdown (should be set to that by default). It's context sensitive, so if you're in point selection mode it will only show you point groups. Also be mindful of what CYTE mentioned: You are doubling up your geometry by merging it like that.
Solaris and Karma » Orthographic cameras in Solaris
- Siavash Tehrani
- 710 posts
- Online
Houdini for Realtime » Niagara ROP not available.
- Siavash Tehrani
- 710 posts
- Online
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