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Found 8 results

  1. Solaris Physics

    Hi guys, does anyone know how to set up the solaris physics simulation for layout to be able put geometry inside another geometry? I tried to compute again the simulation proxy but it doesn't work. They show in the Solaris that it's possible so I am confused how to do it. Here is a gif image to better describe the situation.
  2. Hi, So I'm getting started with arnold through lops. The solaris workshop from sidefx is great but since we use arnold I'm missing a few pieces of the puzzle. 1. Aovs, is it correct that I need to create one rendervar node per AOV I want to export? I have tried both Raw type with "RGBA", "N" etc and LPEs: "C<RD>A" but don't get any output. 2. Is it correct that after the rendervars are defined we add a renderproduct node to reference all the rendervars, and give the image a name, is this where we add frame padding and fileformat, .exr? 3. Rendering with arnold standalone. After the "renderproduct" we add "rendersettings" and "usdrender_rop", none of those has any settings for exporting .ass files, do we render the final shot-usd file directly? And in that case what do we submit to deadline for example, a husk-job? If so what sort of licenses are used to pick up husk jobs? Any clarifications are greatly appreciated. Regards,
  3. 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
  4. 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,
  5. In LOPs / Stage : I'm using a sceneimport ( cameras ) to import an alembic camera from the /obj level. I'm changing the path to that camera's alembic obj in the /obj ( i preimported them ) based on the Context Options Editor pulldowns to swap the shot#. My issue is that it updates the path to the correct camera, but I can't figure out how to force the viewport to update, it keeps looking through the old camera ( which is no longer in the stage ) so then I click on the camera pull-down in the viewport and since the old cam is gone and its just the new one... THEN it updates to look through the correct camera. Does anyone have any ideas how to force this update when changing Context Options panel variables
  6. usd model variants from attribute

    Hi all I've been looking at creating usd variants from the following, thinking on using this to create a model with variants from a piece of geometry that has a primitive attribute called "myattr" with 2 values (say half a sphere with myattr="left", and the other side called "right") 1- sopimport an object into LOPS with prim attributes. 2- create an add variant to existing primitive block 3- done Any ideas on how to iterate through each of the primitive attribute values to create this variants? adding a hip file for reference, maybe someone can help Thanks in advance! usdvariants_from_groups.hipnc
  7. Hi all I've been looking at creating usd variants from the following, thinking on using this to create a model with variants from a piece of geometry that has a primitive attribute called "myattr" with 2 values (say half a sphere with myattr="left", and the other side called "right") 1- sopimport an object into LOPS with prim attributes. 2- create an add variant to existing primitive block 3- done Any ideas on how to iterate through each of the primitive attribute values to create this variants? adding a hip file for reference, maybe someone can help Thanks in advance! usdvariants_from_groups.hipnc
  8. 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
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