Hi,
sorry this might be a newbie question, but Im trying to add some bind input onto the principled shader (custom id inputs in this case).
While the bind is working inside the shader, once promoted my id_channel is always rendering black.
Is there anything Im missing here? I also tried setting up manually a parm to feed into the bind, but also without any luck so far.
Thank you and best regards
Found 13 posts.
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Technical Discussion » Promote bind input onto principled shader
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- kernberg
- 13 posts
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Solaris and Karma » Karma light spread
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- kernberg
- 13 posts
- オフライン
Solaris and Karma » Karma light spread
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- kernberg
- 13 posts
- オフライン
Hi there,
here's a really basic question. Coming from Arnold I'm used to having rectangular lights, whose spread/shadow softness i could control with a spread parameter. Somehow I cant make that functionality work in Karma. I would assume that the focus parameter is intended to do that, but it doesnt seem to have any effect on my side. Is there any trick I'm missing here?
Thank you and best regards
here's a really basic question. Coming from Arnold I'm used to having rectangular lights, whose spread/shadow softness i could control with a spread parameter. Somehow I cant make that functionality work in Karma. I would assume that the focus parameter is intended to do that, but it doesnt seem to have any effect on my side. Is there any trick I'm missing here?
Thank you and best regards
Solaris and Karma » Shader override Custom AOVs in Karma
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- kernberg
- 13 posts
- オフライン
basically a shader override stored in AOV. When I get back to the example of a facing ratio AOV, I wouldnt know how i would do that except overriding the material into a seperate render or, as you said storing that in all materials of the scene
Solaris and Karma » Shader override Custom AOVs in Karma
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- kernberg
- 13 posts
- オフライン
hi thank you for your answer! But that means in the end a global shader overrides as AOV (greyshader on everything) only work if that override gets literally added to all materials in the scene? In other render packages im kinda used to able to hand in a shader as AOV, or am I missing sth here?
Solaris and Karma » Shader override Custom AOVs in Karma
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- kernberg
- 13 posts
- オフライン
Hi,
we're currently trying to translate our workflows into Solaris/Karma and wanna set up a standard set of AOVs.
In general no biggy with the standard ones and LPEs. But Im kinda struggling to build custom shader AOVs, like Arnold has.
Lets say i want to add a facing ratio AOV, how would i feed that into Karma?
Thanks a mil and best regards!
we're currently trying to translate our workflows into Solaris/Karma and wanna set up a standard set of AOVs.
In general no biggy with the standard ones and LPEs. But Im kinda struggling to build custom shader AOVs, like Arnold has.
Lets say i want to add a facing ratio AOV, how would i feed that into Karma?
Thanks a mil and best regards!
Solaris and Karma » Extracting alembic cam resolution
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- kernberg
- 13 posts
- オフライン
Hi,
I'm currently trying to make our Karma nodes read the current cameras abc resolution (maya export) instead of manually setting render resolutions on the Karma node. In SOP level days i would just read from an alembic archive and use ROPs to read the res fromt the camera, which was very handy. At the moment Im not quite sure what the idea/workflow in Karma would be to not manually needing to set the resolutions. On the scene Graph Details I can only find h and l Aperture, no info about the res thoguh. Is there maybe a way to python query the resolution? I'm a bit lost here ^^
Thanks a mil and best regards
I'm currently trying to make our Karma nodes read the current cameras abc resolution (maya export) instead of manually setting render resolutions on the Karma node. In SOP level days i would just read from an alembic archive and use ROPs to read the res fromt the camera, which was very handy. At the moment Im not quite sure what the idea/workflow in Karma would be to not manually needing to set the resolutions. On the scene Graph Details I can only find h and l Aperture, no info about the res thoguh. Is there maybe a way to python query the resolution? I'm a bit lost here ^^
Thanks a mil and best regards
Technical Discussion » LPE for emission influence - Karma
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- kernberg
- 13 posts
- オフライン
Hi
Im currently playing a little with LPEs.
I stepped over a problem that I cant wrap my head around. When I have shape with an emissive shader on it,
I cant really figure out how i would create an AOV from the light that that is being emitted from that shape.
I would have assumed indirect Emission would give you (C.+O) but that doesnt seem to be it.
Thank you and best regards
Im currently playing a little with LPEs.
I stepped over a problem that I cant wrap my head around. When I have shape with an emissive shader on it,
I cant really figure out how i would create an AOV from the light that that is being emitted from that shape.
I would have assumed indirect Emission would give you (C.+O) but that doesnt seem to be it.
Thank you and best regards
Houdini Lounge » Karma Point Lights - Soft shadows?
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- kernberg
- 13 posts
- オフライン
Hi,
we're currently trying to run our first project on Solaris/Karma.
As we work with a lot of underwater scenes, we're trying to create some fake caustics with gobos.
After digging a bit through the forum I found this temp solution:
https://www.sidefx.com/forum/topic/81678/#post-351836 [www.sidefx.com]
From what I can see so far, it seems though, as if Point/Spot lights currenty only can produce 100% hard shadows?
Am I missing something here, or is this a limitation?
Thanks and best regards
we're currently trying to run our first project on Solaris/Karma.
As we work with a lot of underwater scenes, we're trying to create some fake caustics with gobos.
After digging a bit through the forum I found this temp solution:
https://www.sidefx.com/forum/topic/81678/#post-351836 [www.sidefx.com]
From what I can see so far, it seems though, as if Point/Spot lights currenty only can produce 100% hard shadows?
Am I missing something here, or is this a limitation?
Thanks and best regards
Technical Discussion » Context Options Editor - adding string menu items via python
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- kernberg
- 13 posts
- オフライン
Technical Discussion » Context Options Editor - adding string menu items via python
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- kernberg
- 13 posts
- オフライン
Hi,
I'm currently playing a bit with LOPs trying to use the context options editor to control several switches and variables in a multishot setup.
In order to make that work I wanted to use a python script that allows me to add menu items of a context option.
So lets say the context option is called shot and i wanna add an item with the name "shot_01_name" and value "shot_01"
I was going through the documentation and I saw setContextOption() to change the current option, but I was not able to find a way to add items to the menu?
I guess that's something obvious I'm missing here,
but I would be very thankful if somebody could give me a hint.
Thanks mil,
Alex
I'm currently playing a bit with LOPs trying to use the context options editor to control several switches and variables in a multishot setup.
In order to make that work I wanted to use a python script that allows me to add menu items of a context option.
So lets say the context option is called shot and i wanna add an item with the name "shot_01_name" and value "shot_01"
I was going through the documentation and I saw setContextOption() to change the current option, but I was not able to find a way to add items to the menu?
I guess that's something obvious I'm missing here,
but I would be very thankful if somebody could give me a hint.
Thanks mil,
Alex
Technical Discussion » Adding keys to key-value dictionary in python
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- kernberg
- 13 posts
- オフライン
Technical Discussion » Adding keys to key-value dictionary in python
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- kernberg
- 13 posts
- オフライン
Hi,
I was wondering if there's a way to add keys through a loop to a key value dictionary (stored on a null) with python. I got that I can edit keys by hou.parm().set()
But I somehow can't figure out how I would create them. If I run a for loop with an array through set() it would only create and change one key. Could not really find anything in the forum, would be very grateful if sb. could give me a hint
Thanks a mil, cheers
I was wondering if there's a way to add keys through a loop to a key value dictionary (stored on a null) with python. I got that I can edit keys by hou.parm().set()
But I somehow can't figure out how I would create them. If I run a for loop with an array through set() it would only create and change one key. Could not really find anything in the forum, would be very grateful if sb. could give me a hint
Thanks a mil, cheers
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