layering or mixing in karama XPU (H19.5) ?

   2340   17   1
User Avatar
Member
39 posts
Joined:
Offline
hello

just want to know if it possible now to do layering or mixing in karma XPU

thanks
Edited by habernir - July 22, 2022 06:38:52
User Avatar
Member
2222 posts
Joined: June 2008
Offline
Yes it it.
Using Houdini Indie 19.5.
Ubuntu 64GB Ryzen 16 core.
nVidia 3050RTX 8BG RAM.
User Avatar
Member
39 posts
Joined:
Offline
Enivob
Yes it it.
hi

i hope you can help me soo
can you tell me how?

can you share a screenshoots or scene to help me?
Edited by habernir - July 22, 2022 08:23:19
User Avatar
Member
2222 posts
Joined: June 2008
Offline
You can only mix colors, not shaders, so you'll have to adapt your material strategy to leverage that.

Attachments:
Untitled-1.jpg (43.2 KB)

Using Houdini Indie 19.5.
Ubuntu 64GB Ryzen 16 core.
nVidia 3050RTX 8BG RAM.
User Avatar
Member
39 posts
Joined:
Offline
Enivob
You can only mix colors, not shaders, so you'll have to adapt your material strategy to leverage that.
thanks for your time and help

I referred mostly to shaders
and because of that there is complex shaders that you can't create it mtlx .
and there is a mix shaders with non-unifrom shape between them that you can't make it without mixing/layering.
and thanks again.


sidefx made greate job BUT why do they call it a BETA? if it missing a feature that is so basic.
Edited by habernir - July 22, 2022 12:01:04
User Avatar
Member
60 posts
Joined: Feb. 2017
Offline
mtlx mix can mix shaders,like standard surface.

------

sorry,just found that's only supported by Karma CPU.Pity!
Edited by wanglifu - July 23, 2022 02:35:57
User Avatar
Member
371 posts
Joined: Nov. 2010
Offline
Enivob
You can only mix colors, not shaders, so you'll have to adapt your material strategy to leverage that.
Thanks for posting this. I was about to ask the same question.
Time to dive into MtlX I guess.

Are you accessing the CD attribute by any chance in your network?
Edited by OneBigTree - July 23, 2022 20:06:13
User Avatar
Member
60 posts
Joined: Feb. 2017
Offline
MaterialX for Karma XPU now lacks many high-level tools,it's too technical.
User Avatar
Member
60 posts
Joined: Feb. 2017
Offline
OneBigTree
Enivob
You can only mix colors, not shaders, so you'll have to adapt your material strategy to leverage that.
Thanks for posting this. I was about to ask the same question.
Time to dive into MtlX I guess.

Are you accessing the CD attribute by any chance in your network?

Just use Mtlx Geometry Property Value node to bind any attribute,but Cd is a special one,you should call it displayColor in solaris.
User Avatar
Member
371 posts
Joined: Nov. 2010
Offline
wanglifu
OneBigTree
Enivob
You can only mix colors, not shaders, so you'll have to adapt your material strategy to leverage that.
Thanks for posting this. I was about to ask the same question.
Time to dive into MtlX I guess.

Are you accessing the CD attribute by any chance in your network?

Just use Mtlx Geometry Property Value node to bind any attribute,but Cd is a special one,you should call it displayColor in solaris.
I see. I had no luck accessing Cd with the geo property. Now I know why. More special syntax... However there is a node specifically for accessing color which works without any additional conversion.
Thanks for the response.
protozoan
Member
1308 posts
Joined: March 2009
Offline
OneBigTree
More special syntax

Technically, in this special case, it's not SideFX' fault, it's a USD-term. Pixar's to blame.
Martin Winkler
money man at Alarmstart Germany
User Avatar
Member
218 posts
Joined: Nov. 2013
Offline
protozoan
OneBigTree
More special syntax

Technically, in this special case, it's not SideFX' fault, it's a USD-term. Pixar's to blame.

Unfortunately just the balancing act that arises from creating universal terms in the face of DCC’s that invented their own special names for things.
Edited by antc - July 25, 2022 13:35:29
User Avatar
Member
371 posts
Joined: Nov. 2010
Offline
antc
protozoan
OneBigTree
More special syntax

Technically, in this special case, it's not SideFX' fault, it's a USD-term. Pixar's to blame.

Unfortunately just the balancing act that arises from creating universal terms in the face of DCC’s that invented their own special names for things.

Yes, and I do not blame SideFX for the USD language. It's just that there are already several languages to learn in Houdini itself. USD just adds more hurdles for someone who didn't grow up with Houdini and doesn't even know all the "native" syntax for it, and now things are called differently again.
Edited by OneBigTree - July 31, 2022 10:30:28
User Avatar
Member
218 posts
Joined: Nov. 2013
Offline
OneBigTree
Yes, and I do not blame SideFX for the USD language. It's just that there are already several languages to learn in Houdini itself. USD just adds more hurdles for someone who didn't grow up with Houdini and doesn't even know all the "native" syntax for it, and now things are called differently again.

Each context in Houdini tends to have its own concepts and associated learning curve. Have you checked out the lops quick start [www.tokeru.com]? Using displayColor is covered on there.

The Usd Guide [www.tokeru.com] is really good as well.
Edited by antc - Aug. 1, 2022 11:33:21
User Avatar
Member
371 posts
Joined: Nov. 2010
Offline
antc
OneBigTree
Yes, and I do not blame SideFX for the USD language. It's just that there are already several languages to learn in Houdini itself. USD just adds more hurdles for someone who didn't grow up with Houdini and doesn't even know all the "native" syntax for it, and now things are called differently again.

Each context in Houdini tends to have its own concepts and associated learning curve. Have you checked out the lops quick start [www.tokeru.com]? Using displayColor is covered on there.

The Usd Guide [www.tokeru.com] is really good as well.

I have seen it.
The point is: it shouldn't be required just to use Karma properly. A third party renderer like Redshift can be mastered in a day. Karma and the associated new additional contexts and modes require studying, practicing, learning new syntax, tutorials etc. all to get the same thing done.
I don't mind things being done differently. I always have a problem with things being done in the most tedious way possible

However I do understand that this is the result of decades of everyone cooking their own soup and believing every artist only uses one single software ever...

I remember putting up a post in the blender forums starting a discussion about industry standard viewport interaction. I got a wave of objections and flaming and it resulted in Ton writing a letter where he stated basically that blender was made for blender users and industry standards can in fact go and stick their head in a bucket of hot water.
Now look what happened eventually in 3.0: Industry standards. But it took 10 years.

I do hope MaterialX is a path to more standardization. Unfortunately SideFX put Solaris between the artist and this new shader format. A single artist doesn't need USD. Ever. But they need a fast renderer - always.
For me Houdini is just a part of my toolset. I do everything in the CG process from start to finish including compositing. So I don't and can't spend all my time in Houdini, doing tutorials and courses and learn by doing 8h a day. And I am sure there are many more like me out there.
User Avatar
Member
218 posts
Joined: Nov. 2013
Offline
OneBigTree
I have seen it.
The point is: it shouldn't be required just to use Karma properly. A third party renderer like Redshift can be mastered in a day. Karma and the associated new additional contexts and modes require studying, practicing, learning new syntax, tutorials etc. all to get the same thing done.
I don't mind things being done differently. I always have a problem with things being done in the most tedious way possible

I hear what you're saying but it seems like the goal of the scene import lop is to offer a simpler path. You can create your materialx stuff in the mat context, bind to geo in either obj or sops, create lights in obj, and then import the whole lot into solaris with a single node.
User Avatar
Member
11 posts
Joined: Feb. 2018
Offline
OneBigTree...I really have to say that I think you are wrong on so many levels, but I understand, learning curves can be tough. I don't think that redshift can be mastered in a day unless you just make simplistic motion graphics. I have been using Redshift since version 0.5. I have spent many years working with renderers, starting with ElectricImage, Mental Ray, and Prman. Currently, I use, Mantra, Redshift, Karma, Unreal, and straight up openGL and, I don't think I have mastered any of them. I have just recently gone down the MaterialX, Karma XPU road and am pretty impressed with the quality, speed, and with what you can do. Whatever Redshift is, it is not a production renderer in the same way as Mantra, Prman, or Karma. But that also means, maybe it is not the renderer for you, and an easier solution is more compatible with the kind of work you do.

To say as an individual artist that you will never need USD, you are ignoring the direction that the industry is headed and don't understand what the benefits are. If you want a fast renderer why not try Nvidia Omniverse and understand the direction that industry is headed, or just open a USD file in Touchdesigner. There is a reason that it is the backbone of Pixar and what every studio is or will be moving to.

3D is getting easier for everybody, and making trivial 3d is now open to those that just a year ago were only using illustrator. As the tools get easier, your job gets more and more replaceable. Ultimately, an artist can make great work with almost any tool, but I have never really met an artist that has mastered anything, let alone in a day. Explore the world around you, there is much that is interesting out there
User Avatar
Member
218 posts
Joined: Nov. 2013
Offline
Whether or not some tool or piece of technology is worth learning for whatever task is never black and white. One layer of tech will never work for everyone. The important thing to remember with lops (and Houdini in general) is that if some workflow or task is too difficult or tedious, it usually indicates it hasn't been wrapped up or streamlined sufficiently out the box. Dops isn't a straightforward context either, but vellum enables artists to create amazing things quite easily and as a result tend to be less concerned about how difficult dops is to master.
Edited by antc - Aug. 8, 2022 22:49:10
  • Quick Links