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This course is designed to educate learners on ways to take a noisy Karma render, find the sources of the noise, and end with a clean final render. The course will begin with a look at AOVs and LPEs, as these will be the way that you can narrow in on the sources of noise in your rendered images.

Since Karma has two distinct modes, CPU & XPU, there are different ways to go about cleaning up renders depending on which is in use. Karma also ships with two different denoisers, and we’ll look at the considerations when using either. For Karma CPU we’ll walk through the step-by-step adjustments that you can make to dial in the quality of your renders.

To end the course we will go through some optimization tips for some common situations: interiors lit from a dome light, strong depth of field, more efficient cutout alpha, and caustics. Upon completing this course learners should feel comfortable taking their renders from noisy to clean, and be able to set up AOVs and simple LPEs.

CREATED BY

PArcara09
PETER ARCARA

SideFX Training Lead

More from Peter Arcara

コメント

  • knockflakes 3週間, 4日 前  | 

    Thänx a lot for this great tutorials!

    • PArcara09 2週間, 5日 前  | 

      Thanks for watching, and for the kind words!

  • sans_comic 3週間, 3日 前  | 

    Thank you for these great tutorials.

    • PArcara09 2週間, 5日 前  | 

      No problem! Thanks for watching.

  • chrisrezende 3週間 前  | 

    Hi Peter. I really enjoy your tutorials. Thanks a lot!

    • PArcara09 2週間, 5日 前  | 

      Thanks so much. I'm glad that they're helping people.

  • 444366454 2週間, 5日 前  | 

    @PETER ARCARA Karma how to skip rendered frames like mantra? use usdrender_rop Pre - Render Script with python?

    • PArcara09 2週間, 5日 前  | 

      No, luckily it's much simpler than that!

      All you need to do is use the "Inc" parameter on the USD Render ROP. It is the third field in the "Start/End/Inc" parameter that is available when you change the Valid Frame Range dropdown to "Render Specific Frame Range".

      Hopefully that should get you the result you're looking for.

      • 444366454 2週間, 5日 前  | 

        Sorry . I mean is Skip files that exist or Skip frames that are valid images. (Overwrite existing frames)

        • PArcara09 2週間, 3日 前  | 

          I don't know of a way to do this with just the USD Render ROP, but if you simply run the export through TOPs that should identify your files on disk and skip over the existing files.

  • yeseong 2週間, 4日 前  | 

    Thanks a lot for this tutorial !

  • BabaJ 2週間, 3日 前  | 

    Just a 'minor' issue.
    But in your Secondary Samples video part, in the video when you select indirectemission from the Render Gallery drop down, your video shows some results and you don't even touch 'brightness' controls.

    With the supplied .hip file as is, I find when I select the drop down for indirectemission, there is nothing but black screen;
    With the inspector there is no values returned anywhere in the image, and brightness levels doesn't change anything.

    • PArcara09 2週間, 3日 前  | 

      It looks like this is due to the Cone object being changed from an emissive texture to a Geometry Light in the Houdini Test Scene. It seems that currently Geometry Lights aren't in the Emissive AOV.

  • Mike_A 6日, 12時間 前  | 

    Very, very helpful - thanks Peter!

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