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Houdini Lounge » Remnant II game
- Heileif
- 127 posts
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Solaris and Karma » Karma Shadow Matte
- Heileif
- 127 posts
- Online
Redshift has matte object. It makes it so easy to integrate the cg into the plate in the renderview, without doing allot of custom stuff just to get shadow and reflection into the background from the cg objects.
Just a toggle away on the mesh to get it working.
https://help.maxon.net/r3d/houdini/en-us/#html/Matte+Options.html?Highlight=matte [help.maxon.net]
Just a toggle away on the mesh to get it working.
https://help.maxon.net/r3d/houdini/en-us/#html/Matte+Options.html?Highlight=matte [help.maxon.net]
Technical Discussion » Why is this Fluid surface flickering still happen?
- Heileif
- 127 posts
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Seems like you need smaller particle separation.
Edited by Heileif - Sept. 13, 2023 18:03:47
Solaris and Karma » Hey guys, I have a problem with karma. Could you please help
- Heileif
- 127 posts
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You need to select the camera you want to be used for rendering in the Render settings(karmarendersettings). Its at the top of the settings.
You should also probably connect your camera to the "Input Stage" input and not the "Additional Render Vars"
You should also probably connect your camera to the "Input Stage" input and not the "Additional Render Vars"
Edited by Heileif - Sept. 5, 2023 19:34:59
Technical Discussion » How to put sublayers under a parent layer in Solaris
- Heileif
- 127 posts
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Reference node is better if you want to change the structure of the scene graph, it will remove the top layer of the referenced file tho. So you can't have multiple objects at the root of the usd file you are referencing.
Technical Discussion » Using a `details... expr in the filepath arg of a FILE node?
- Heileif
- 127 posts
- Online
Been fighting that expression multiple times before.
This one should work.
E:/Iron Age Project/Terrain/LandscapePatch_`detail("../foreach_count1/", "iteration", 0)`.fbx
Edit: Dam, I was to slow.
This one should work.
E:/Iron Age Project/Terrain/LandscapePatch_`detail("../foreach_count1/", "iteration", 0)`.fbx
Edit: Dam, I was to slow.
Edited by Heileif - Sept. 1, 2023 12:18:36
Technical Discussion » best way to transfer simulated grooms?
- Heileif
- 127 posts
- Online
Technical Discussion » How to set different textures using attribute [ REDSHIFT ]
- Heileif
- 127 posts
- Online
You can also use the rsUserDataString connected to the Redshift OSL Texture node(From Github).
Edited by Heileif - July 26, 2023 12:28:51
Solaris and Karma » Redshift crashes when optix denoiser is enabled
- Heileif
- 127 posts
- Online
You should post this on the Redshift forum. The Houdini Redshift developer is fast to help.
Edited by Heileif - July 24, 2023 10:23:41
Solaris and Karma » Texture Map on Karma Hair Shader
- Heileif
- 127 posts
- Online
I think you have to use the ray import node.
https://www.sidefx.com/docs/houdini/nodes/vop/kma_rayimport.html [www.sidefx.com]
And use the ray:hituv to get uv, not sure if it works with the xpu mode tho.
https://www.sidefx.com/docs/houdini/nodes/vop/kma_rayimport.html [www.sidefx.com]
And use the ray:hituv to get uv, not sure if it works with the xpu mode tho.
Edited by Heileif - July 3, 2023 16:08:39
Houdini Lounge » Houdini 20 Rumors
- Heileif
- 127 posts
- Online
zf3d
houdini usd lop Currently, it's too easy to die
Hope to be stable, stable, and more stable, replacing Clarise
Clarrise is dead btw.
Link [www.cgchannel.com]
Houdini Lounge » What is up with light "Exposure"?
- Heileif
- 127 posts
- Online
lor
Hello ladies & gents,
I don't disagree that exposure , Fstop, Tstop, shutterspeed/angle should be a part of our toolset. Absolutely they should. But they should do what they do in a camera not something vaguely similar that can be roughly explained through convoluted logic. This control is not analogous to F-stop or Tstop, which affect all lights. This is a per light intensity control.
We have two things on set related to light. Lights and a camera. Lights put out a certain quality/quantity of light. Cameras receive it. Light intensity controls the quality/quantity of light coming OUT of particular light source. (This is what the new houdini light "exposure" control does). Camera exposure affects the light coming IN to the camera. the new houdini light "exposure" control does not do this. It's pretty simple. The exposure control doesn't control exposure.
We need a physical camera with functional exposure control.
For an example of a great physical camera, have a look at VRay.
In Houdini, the shutter"time" and fstop controls have no effect on exposure. There is, effectively no exposure control in houdini, making light intensity values arbitrary. So I can see why people are asking for exposure control, but it would be nice if that was actual exposure control, not a secondary exponential light intensity control, per light.
@Andy58, thanks for that quote. It is my opinion that lighting people SHOULD have to use huge values like 10,000. In this way they can begin wrapping their heads around the real nature of light. That's what real light intensity actually is! It is essential we break away from the old thinking that lights need to be at or below 1.0 int. Artists who start to get a handle on how friggin bright lights actually are tend to do better work and use their tools better, IMO.
Nick
@lor, Regarding "It is my opinion that lighting people SHOULD have to use huge values like 10,000." Do you only use the linear intensity still, even when working with spotlights?
Spotlights is the reason I started to use exposure on the lights instead. Hated those crazy high intensity values.
Edited by Heileif - June 30, 2023 21:59:31
Solaris and Karma » Solaris opacity map XPU
- Heileif
- 127 posts
- Online
You can set it global on the machine to.
https://docs.oracle.com/en/database/oracle/machine-learning/oml4r/1.5.1/oread/creating-and-modifying-environment-variables-on-windows.html [docs.oracle.com]
https://docs.oracle.com/en/database/oracle/machine-learning/oml4r/1.5.1/oread/creating-and-modifying-environment-variables-on-windows.html [docs.oracle.com]
Technical Discussion » GPU VRAM sharing in Karma
- Heileif
- 127 posts
- Online
AnsonSavageHeileif
NVLink still works, some more info here.
https://support.maxon.net/hc/en-us/articles/1500006456521 [support.maxon.net]
"Finally, it should be noted that the VRAM of multiple GPUs is not combined together! I.e. if you have an 8GB GPU and an 11GB GPU installed on your system, these do not add up to 19GB! Each GPU can only use it’s own VRAM, unless you link them together with NVLink. NVLink is an NVidia technology (so it’s only supported on NVidia GPUs) which can “bridge” two GPUs together so that they can share each other’s memory. This comes at a performance penalty which might or might not be considerable in some cases. Redshift automatically detects and uses NVLink, if present."
Strange they did not mentioned it on the link you sent.
Oh, cool! From what I read, NVIDIA doesn't support NVLink on 4090s anymore, is that right?
Yes
Technical Discussion » GPU VRAM sharing in Karma
- Heileif
- 127 posts
- Online
NVLink still works, some more info here.
https://support.maxon.net/hc/en-us/articles/1500006456521 [support.maxon.net]
"Finally, it should be noted that the VRAM of multiple GPUs is not combined together! I.e. if you have an 8GB GPU and an 11GB GPU installed on your system, these do not add up to 19GB! Each GPU can only use it’s own VRAM, unless you link them together with NVLink. NVLink is an NVidia technology (so it’s only supported on NVidia GPUs) which can “bridge” two GPUs together so that they can share each other’s memory. This comes at a performance penalty which might or might not be considerable in some cases. Redshift automatically detects and uses NVLink, if present."
Strange they did not mentioned it on the link you sent.
https://support.maxon.net/hc/en-us/articles/1500006456521 [support.maxon.net]
"Finally, it should be noted that the VRAM of multiple GPUs is not combined together! I.e. if you have an 8GB GPU and an 11GB GPU installed on your system, these do not add up to 19GB! Each GPU can only use it’s own VRAM, unless you link them together with NVLink. NVLink is an NVidia technology (so it’s only supported on NVidia GPUs) which can “bridge” two GPUs together so that they can share each other’s memory. This comes at a performance penalty which might or might not be considerable in some cases. Redshift automatically detects and uses NVLink, if present."
Strange they did not mentioned it on the link you sent.
Technical Discussion » GPU VRAM sharing in Karma
- Heileif
- 127 posts
- Online
The cards would need to be connected with a nvlink to share memory. Sadly Nvidia have been removing the nvlink connection from the gaming cards lately
Solaris and Karma » Optimal alembic to USD?
- Heileif
- 127 posts
- Online
Use the file node inside lops.
You probably have to clear the filtype filter, it will only show usd files by default.
If you need to change location of the cache in the scene graph, use reference node instead.
You probably have to clear the filtype filter, it will only show usd files by default.
If you need to change location of the cache in the scene graph, use reference node instead.
Edited by Heileif - May 11, 2023 07:39:05
Solaris and Karma » multiple karma rendering in sequence?
- Heileif
- 127 posts
- Online
Not infront of computer but something like this should work.
Make a ropnet and make fetch nodes that are pointing to the karma usdrender rop.
Make a ropnet and make fetch nodes that are pointing to the karma usdrender rop.
Solaris and Karma » hide polygon faces on a geom prim?
- Heileif
- 127 posts
- Online
Holeindices should work, if you want to hide faces at rendertime. Not the easiest thing to get up and running the first time tho.
Houdini Lounge » Groom Rendering Mem Issues - Workflow / Optimization
- Heileif
- 127 posts
- Online
Can maybe try to bake out the groom as ass files. Can't be more lightweigth for Arnold then I suppose.
Had to do kinda the same on the last film i worked on. But groom was exported as rs files, thats Redshift version of the ass files.
Had to do kinda the same on the last film i worked on. But groom was exported as rs files, thats Redshift version of the ass files.
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