Welcome to the LOPs Lighting Tutorial. Houdini’s tooling and support for USD is collectively known as Solaris. Solaris includes USD support in the view and a new network type, LOPs (Light Operators). LOP networks are similar to SOPs, where each node accepts incoming geometry, modifies it, and outputs new geometry. In LOPs, each node accepts an incoming USD scene, modifies it, and outputs a new scene. LOPs also features Houdini’s new renderer, Karma, which consumes usd instead of ifd, which mantra consumed. The LOPs context features many new enhancements to make lighting faster and more efficient.

You should already be familiar with Houdini before doing this tutorial. 



Sean brings over 20 years of Visual Effects production experience as an artist, manager, and supervisor. He has an impressive list of credits on films such as Lord of the Rings, X-Men, The Golden Compass, Cloud Atlas, and Transformers to name a few. Sean brings a strong knowledge of Houdini, having used it since Inception in 1999, and has worked closely with SideFX over the years as a consultant and guest speaker. He is currently Lead Houdini Instructor at Lost Boys School of VFX in Montreal, and works as a Content Creator for SideFX.

More from Sean Lewkiw


  • BabaJ 1 year ago  | 

    I'm only an "Indie Artist" so I don't fully make use of the features possible in LOPs like a production team would; But even so the more I use LOPs the more I like it and enjoyed your first tut series on them which helped sort out my own work flows. So am looking forward to going through these tuts you put together when I get a chance. Thanks.

  • mrCatfish 12 months ago  | 

    Thanks for the comments and glad the tutorials are helping you.

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