KarmaXPU Quickstart Pt. 1 - Basic Lighting, Shading & Rendering

Support us on Patreon: www.patreon.com/entagma
In this tutorial we’ll shade, light and render the geometry we created in our previous tutorial, inspired by Alex Valentina’s Work for Form Mag.
We’ll be setting up a simple scene graph in solaris, import and light our geometry using an HDRI and then spend a bit of time setting up and tweaking materials in MaterialX.
Download Project File: www.entagma.com/downloads/Kar...
00:00 - Intro To Solaris
00:36 - Importing Geometry To Solaris & Setting Up A Basic Scene
02:12 - Domelight Settings
03:27 - Assigning & Creating A Material Using MaterialX
05:37 - Blending Colors (DIY Fresnel Falloff)
06:52 - Quirks In MaterialX Subnets (plz help!)
10:35 - Setting Up A Background Grid
15:02 - Setting Up KarmaXPU For Rendering
16:53 - Applying OCIO Color Space (ACESCG to srgb)
18:11 - Infamous Last Words

[@ThomasKlyhnChristensen]

The reason why you can't see the "kma" nodes is because they are houdini specific nodes by sidefx, not part of the materialX definition. So access them you need to put down the "Karma materialX subnet" and NOT the "USD materialX subnet" which is strictly following the materialX definition. Same way you get access to the volume and the hair shader, you have to create the karma materialX subnet, its the same thing + sidefx nodes.

[@elliotstronge4839]

I know I'm late to the party but what I've started doing is (in the top level material library node before diving into it) replacing string in the tab menu mask with just an "*" so I can get access to all the nodes I want, including mtlx standard surface etc

[@saucemonster_the_movie]

@@elliotstronge4839 thanks, great tip

[@YonnideHaar]

If you use a Karma material x subnet, instead of a regular one you can access the karma ray node straight away. Great tutorial, as always :)

[@carlosrivadulla8903]

The workflow is starting to look smooth, I hope some day u can jump into COPs to cover ur compositing needs as well.

[@cesaramaral7007]

Thank you! This was my first render ever in Houdini. And I could customize it very easily

[@TheNouin]

Thx alot, more materialx shading videos plz, you guys are amazing!!

[@Carlosmatos-nx4uc]

18:56 well, placing 4 gpu next to each other will cause one of them to overheat if not all. Love how neat and cool your build looks but that case does not have great airflow. Btw thanks for covering Houdini solaris workflow.

[@beomjunhong3340]

Thanks.

[@damienmanuel2584]

Thoroughly enjoyed both. Thanks a lot. Question: how fast is Karma really if you still need 3 GPUs ?

[@baskoartega]

one thing so, in the case you have different geo nodes in the obj tab, and you wanted to assign one material per each, lets say 4, will you need to add 4 material library nodes and assign them if possible? Or more like SOP importing them one by one followed by a material library set to assign material to the node parented?

[@szymonsniegocki528]

I am so glad you began this series. There is no much resources out there, esspecialy for more avanced topics, including working with geoemtry properties and sims. I wasted a lof of hours trying to solve this issues by trial and error Ps. Do you know how to render single layers exr instead of multilayers?

[@artadecram_9624]

I think there is not enough video-material on karma - can I study mantra before karma? How manrta is comparable to karma?

[@philippwelsing9108]

So good, thank you! Just for my understanding, and to not have to cook the sim again every time you open the project - would it be a good way to save the output of the sim (SOPS level) to a USD? And just import that USD into Solaris? THANKS AGAIN, you guys are the reason I did never give up on Houdini.

[@revg9742]

sheesh.. 3 gpu :).. thx for the tutorial sir

[@wuixorew9436]

It's a pity H19.0 doesn't have FacingRatio.Is there any replacement node?

[@christianvolkner2028]

As far as I know the facing ratio node currently is not supported by XPU. But it didn’t change the look much, did you actually trick the system?

[@christianvolkner2028]

Hello, you need to use a Karma MaterialX subnet for the Karma nodes to be included :-)

[@christianvolkner2028]

Oh, I just read that it was answered like two times already😅

[@ahmednasr93]

if there is a scene with an animated camera in Houdini and I want to render it in unreal, how to do it? please.

[@ooewom7752]

Hi! quick question: why i have cookin op geo every time when i add any mtlx nodes to the mtlx subnet? if dont use subnet and build material just in matlib level everything goes fine. 19.5.569

[@6rilllir6]

thanks for video, too bad you didn't use the curvature attribute you created in the previous video : /

[@adityaprabhu1307]

sotNice tutorialng in the soft roll and the soft outgrows the length of the step sequencer. it's not obvious how to "shrink" the soft rolled

[@nonenone2748]

Houdini is famous for its deduralism, and Karma is as procedural as polygonal modeling?