MaterialX online library

Forums Solaris and Karma MaterialX online library

16831 31 9


Mark Wallman: Member; 711 posts; Joined: Aug. 2013; Offline

Dec. 21, 2021 1:51 p.m.

Hi.

I just came across AMD's online library to download/upload MaterialX materials.

https://matlib.gpuopen.com/main/materials/all?category=Plaster [matlib.gpuopen.com]

Best

Mark


jsmack: Member; 8115 posts; Joined: Sept. 2011; Offline

Dec. 21, 2021 2:18 p.m.

Mark Wallman
Hi.

I just came across AMD's online library to download/upload MaterialX materials.

https://matlib.gpuopen.com/main/materials/all?category=Plaster [matlib.gpuopen.com]

Best

Mark

They don't seem to be compatible with solaris. I tried one, and it uses a nodegraph defined node, which solaris can't seem to see into, so the material appears as a gray shader.

Attachments:
matx_graph_graph_satin_brass.png (783.2 KB)
amd_matx_satin_brass.png (473.1 KB)


Mark Wallman: Member; 711 posts; Joined: Aug. 2013; Offline

Dec. 21, 2021 2:21 p.m.

Oh dear. There was me hoping materialX would work through different apps. I hope these are just issues because it is so new best


jsmack: Member; 8115 posts; Joined: Sept. 2011; Offline

Dec. 21, 2021 2:29 p.m.

Mark Wallman
Oh dear. There was me hoping materialX would work through different apps. I hope these are just issues because it is so new best

It seems like Solaris doesn't really support materialX at all. Sure it can use the base nodes as a shading graph for karma, but if it can't decode nodegraphs, it's not much use for interchange.


jason_iversen: Member; 12768 posts; Joined: July 2005; Offline

Dec. 21, 2021 5:25 p.m.

I would think that this is just a bug, or some unconventional thing going on.

Edited by jason_iversen - Dec. 21, 2021 17:41:23

Jason Iversen, Technology Supervisor & FX Pipeline/R+D Lead @ Weta FX
also, http://www.odforce.net [www.odforce.net]


jsmack: Member; 8115 posts; Joined: Sept. 2011; Offline

Dec. 22, 2021 3:49 a.m.

jason_iversen
I would think that this is just a bug, or some unconventional thing going on.

It's nodedefs that aren't working. I'm not sure if it's a bug or just a feature that's not implemented yet.


mtucker: Staff; 4535 posts; Joined: July 2005; Offline

Dec. 22, 2021 2:23 p.m.

We'll definitely be looking into these issues early in the new year. Right now most of us are on vacation, so please be patient. While that AMD library of MaterialX materials was hugely exciting, the timing didn't give us much chance to respond to the issues that cropped up.

Happy holidays!


w007s: Member; 19 posts; Joined: Sept. 2015; Offline

Dec. 27, 2021 7:49 a.m.

Technically how to import .mtlx into houdini?


BrianHanke: Member; 452 posts; Joined: April 2018; Online

Dec. 27, 2021 10:19 a.m.

w007s
Technically how to import .mtlx into houdini?

Import the .mtlx file as a reference in Solaris. It will then show up in the Scene Graph Tree and you can assign it to geometry.

Subscribe to my Patreon for the best CG tips, tricks and tutorials! https://patreon.com/bhgc [patreon.com]

Twitter: https://twitter.com/brianhanke [twitter.com]
Behance: https://www.behance.net/brianhanke/projects [www.behance.net]


w007s: Member; 19 posts; Joined: Sept. 2015; Offline

Dec. 29, 2021 6:16 a.m.

BrianHanke
Import the .mtlx file as a reference in Solaris. It will then show up in the Scene Graph Tree and you can assign it to geometry.

So import?

Attachments:
123.jpg (192.4 KB)
ScreenRecorderProject51.mp4 (1.9 MB)


jsmack: Member; 8115 posts; Joined: Sept. 2011; Offline

Dec. 29, 2021 11:51 a.m.

w007s
BrianHanke
Import the .mtlx file as a reference in Solaris. It will then show up in the Scene Graph Tree and you can assign it to geometry.
So import?

Yes, import it just like any other USD file. The materials are not different from materials created with a material library. They still have to be assigned correctly to work. In your video, you've assigned a blank prim, "Shaders". The materials under "Materials" are the prims to assign as materials. The "Shaders" prim is purely for organization and cannot be assigned.


tony_a: Member; 87 posts; Joined: Jan. 2009; Offline

Jan. 5, 2022 10:49 a.m.

Did you manage to get this to work? I've downloaded the Marble_Verde_Guatemala_Slatted material and used a reference node to bring it in to lops. When I try to assign it to a sphere and render in Karma though it doesn't seem to work. I'm assigning the MaterialX_Graph material, under Materials. Am I doing something wrong?

(using Houdini 19.0.455 apprentice)

Attachments:
Screenshot from 2022-01-05 15-44-57.png (55.5 KB)
Screenshot from 2022-01-05 15-46-10.png (53.0 KB)


Mark Wallman: Member; 711 posts; Joined: Aug. 2013; Offline

Jan. 5, 2022 10:52 a.m.

Hi. Not yet. Sorry.


mark: Staff; 2654 posts; Joined: July 2005; Offline

Jan. 5, 2022 2:59 p.m.

The dev team is currently looking into this and hopefully will have some answers for you soon.


mark: Staff; 2654 posts; Joined: July 2005; Offline

Jan. 20, 2022 3:33 p.m.

mark
The dev team is currently looking into this and hopefully will have some answers for you soon.

It looks like there's been an update to the AMD MaterialX library. The materials work a lot better in Solaris out of the box now. You should be able to just load them up using a File LOP. There may be some organizational things like paths to textures or shader names which might need some slight adjustment, but the materials are now way more compatible with Solaris.

Attachments:
amd_mtlx.png (856.1 KB)


Mark Wallman: Member; 711 posts; Joined: Aug. 2013; Offline

Jan. 21, 2022 2:05 a.m.

Thanks Mark!


Hamilton Meathouse: Member; 204 posts; Joined: Nov. 2013; Offline

Jan. 24, 2022 10 p.m.

mark
mark
The dev team is currently looking into this and hopefully will have some answers for you soon.
It looks like there's been an update to the AMD MaterialX library. The materials work a lot better in Solaris out of the box now. You should be able to just load them up using a File LOP. There may be some organizational things like paths to textures or shader names which might need some slight adjustment, but the materials are now way more compatible with Solaris.

Mark, what version of Houdini are you using for this? I'm on 19.0.498 (Python 3) on Linux Mint and when I load as you have done above, I get the following error messages:

Error 
Unable to find layer file: /home/dave-linux/Desktop/DOWNLOADS/CarPaint_SingleColor_4k_16b/CarPaint_SingleColor.mtlx 
Warning 
Failed to load plugin 'usdMtlx': libOpenGL.so.0: cannot open shared object file: No such file or directory in '/opt/hfs19.0.498/dsolib/usd_plugins/usdMtlx.so' 
Warning 
Failed to load plugin 'usdMtlx': libOpenGL.so.0: cannot open shared object file: No such file or directory in '/opt/hfs19.0.498/dsolib/usd_plugins/usdMtlx.so' 
Warning 
Cannot determine file format for @/home/dave-linux/Desktop/DOWNLOADS/CarPaint_SingleColor_4k_16b/CarPaint_SingleColor.mtlx@

/opt/hfs19.0.498/dsolib/usd_plugins/usdMtlx.so definitely exists, not sure why it's complaining about that.


mtucker: Staff; 4535 posts; Joined: July 2005; Offline

Jan. 25, 2022 12:52 a.m.

It's not usdMtlx.so that is missing, it is libOpenGL.so.0 (which is used by usdMtlx.so) that is missing. That is a system library, which I believe you can install (depending on your Linux distribution) with a command like:

sudo apt-get install libopengl0


jsmack: Member; 8115 posts; Joined: Sept. 2011; Offline

Jan. 25, 2022 1:14 a.m.

Hamilton Meathouse
Mark, what version of Houdini are you using for this? I'm on 19.0.498 (Python 3) on Linux Mint and when I load as you have done above, I get the following error messages:

Are other mtlx files working, such as the one of the examples in the HFS? That material is working for me, although I haven't tried it with 498. (I'm on 505) I've noticed a few of the materials have errors, such as missing textures or disconnected inputs, but so far it hasn't caused karma to reject them.


JYA: Member; 5 posts; Joined: May 2016; Offline

Jan. 25, 2022 12:05 p.m.

Hello

Is there any way to edit the materialX (import via FILE) in order to modify it?
In advance a BIG THANK YOU

Best regards

JY

Edited by JYA - Jan. 25, 2022 12:06:26

Attachments:
Import edit.jpg (1.1 MB)

Quick Links

                    
                        Search links
                        Show recent posts
                        Show unanswered posts
                        
                    
                

                    
	

                

                    
                    ▼Jump to
Houdini
News
Houdini Indie and Apprentice
Houdini Lounge
Technical Discussion
Work in Progress
Houdini Learning Materials
BYOC + Illume
Houdini for Realtime
Solaris and Karma
Rigging
Animation
PDG/TOPs
The Orbolt Smart 3D Asset Store
Houdini Jobs
日本語フォーラム
Licensing
Houdini Engine
Houdini Engine API
Houdini Engine for Unreal
Houdini Engine for Unity
Houdini Engine for Maya
Houdini Engine for 3ds Max
Private
Contests
Mardini 2025
Mardini 2023
H20 Tech Art Challenge
Mardini 2024
SideFX Labs Tech Art Challenge 2022
MARDINI Daily Art Challenge 2022
SideFX Labs Tech Art Challenge 2021
MARDINI Daily Challenge 2021
Nodevember 2020
HOULY Daily Challenge
3rd Party Software and Tools
3rd Party
SI Users

                    
                