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Found 11 results

  1. Hi all, I'm not a lighting or shading person. I'm barely a Houdini person, if the truth was told, but I struggle on... I am having a terrible time trying to figure out how to assign random textures to packed geometry in Solaris/Lops/USD/Karma (referred to as SULK from now on, OK?) I have a Crowd scene with some flag waving agents. I want the flags to have a material on them where I can choose a random texture from a set of three textures. With me so far? Excellent. How? I've tried 'editMaterial' node I've tried 'materialVariation' node I've even looked at 'variations' but that's s total mess in there - I'm not going anywhere near that! The flag geometry is packed and has an attribute called 'flagTex' which has a random int value from 1 - 3. When I import the geometry into SULK, that attribute becomes primvar@flagTex So far so mediocre. Now the problem: How do I use that attribute to choose a texture file on the shader? I can do this in Mantra, so I would expect it can be done in SULK, but how? I expected SULK to relieve some of the pain of StyleSheets but in truth it is a lot worse. Please, someone, help me out here before I throw in the towel and ditch SULK. Many thanks. Dan
  2. Shading Theory with Karma

    I'm happy to announce that I've teamed up with SideFX to release a new free course! - Shading Theory with Karma. These videos are designed to teach you the fundamental ideas behind shading/texturing while utilizing the principled shader, karma, and my dear friend - Shaderbot. Visit CG Forge to download shaderbot along with access to the videos for free. https://www.cgforge.com/course?courseid=shadingtheory Have a nice day,
  3. Hi I have gone through docs, forums etc and cannot get any kind of motion blur working in Karma. I have added the cache node. I have increased the distance between shutter open and closed to maximise the effect of motion blur. Nothing works. I just want to see motion blur when I change my viewport from Houdini GL to Karma.My other question is the docs say in order to save out you usd geo to motion blur in the future you need to change the data. What data where? I have Multiverse USD install in Maya and for an idiot like me it is super straight forward to see how to export sub-frames for motion blur. How do you do this in Houdini?Screenshot of multiverse usd write from Maya In the example hip file I have taken out my ABC file of a ball rotation ans used something internal instead. No luck all all. https://paper.dropbox.com/doc/Write-USD-Asset-87RXiZG8ex6z7EAh6unM0 windows 10 H 18.0.391 All the best Mark introTo_usd.hipnc
  4. Hey, I was wondering if I was the only one having this issue with Karma on H18 : I can't use geoLight or emissive Volume to light an other object. Any idea ? Maybe it's still impossible on the early beta version.. Sylbert. PS : I haven't find a way to setup the amount of ray limit in Karma setting as well..
  5. I can get custom shading working with Karma if I pipe to the F input on the surface_output node, but not if I use the Cf input. We're doing non-photorealistic rendering and really need to use the Cf (and related) inputs in order for Karma to work for our art style.
  6. I've start test Houdini 18 and Arnold 6. the first test was simple splines rendering, 250.000 splines instanced 25 times. it loads a 140MB alembic file. rendered in 6 core Xeon CPU and Nvidia Quadro RTX 5000. (windows 10 pro) the startup for Arnold GPU is slow, it renders faster, so it seems but for clear up the final image it takes for forever or just dropped /crashed, hard to tell on the GPU. the CPU is quite fast but much slower then GPU if it ever would finish. (adaptive sampling was on) As soon as Arnold finishes rendering the scene, it stops and do not refresh any more on parameter changes. so far i am not impressed with the Arnold GPU rendering. here is the same scene Arnold CPU with only direct Lighting. (on my MacBook) some test with Arnold GPU. it performed much better with just direct lighting.
  7. Has anyone used Karma render for exterior renderings? I was thinking to buy or not to buy redshift license. Are this two render tools compareble?
  8. Are there any good resources on rendering particles with Karma? And does it support micropolygon rendering? Thanks
  9. Karma & LOPs - CG Forge

    Hello ODforce! I just added a new Houdini 18 update to my course, "Houdini for the New Artist" that goes over the basics of LOPS and Karma with Houdini 18: In the near future, I'll be adding more updates to my other courses which you can find at www.cgforge.com Happy holidays! - Tyler
  10. https://www.sidefx.com/products/houdini/whats-new-in-18/ And to get your feet wet, Entagma release some H18 videos for the release. https://entagma.com/new-in-houdini-18/ Lops Tutorials and docs https://www.sidefx.com/docs/houdini/solaris/tutorials.html
  11. There's a donate button on his page Vimeo link if you're feeling community-minded. I don't know the guy but I feel like I owe him a bottle of scotch or something for the tutorials. -k
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