Log into your account to keep track of your progress. You can work through the lessons without logging in but your progress will be lost when you refresh the page.

TOTAL DURATION: 2h 20m

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

COMMENTS

  • knockflakes 3 weeks, 4 days ago  | 

    Thänx a lot for this great tutorials!

    • PArcara09 2 weeks, 5 days ago  | 

      Thanks for watching, and for the kind words!

  • sans_comic 3 weeks, 4 days ago  | 

    Thank you for these great tutorials.

    • PArcara09 2 weeks, 5 days ago  | 

      No problem! Thanks for watching.

  • chrisrezende 3 weeks ago  | 

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

    • PArcara09 2 weeks, 5 days ago  | 

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

  • 444366454 2 weeks, 6 days ago  | 

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

    • PArcara09 2 weeks, 5 days ago  | 

      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 weeks, 5 days ago  | 

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

        • PArcara09 2 weeks, 3 days ago  | 

          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 weeks, 4 days ago  | 

    Thanks a lot for this tutorial !

  • BabaJ 2 weeks, 3 days ago  | 

    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 weeks, 3 days ago  | 

      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 days, 15 hours ago  | 

    Very, very helpful - thanks Peter!

Please log in to leave a comment.