Lop Expression Inconsistency

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Greetings Gang -

I'm going through the Lops Tutorial #4 and I'b a ‘bit’ stuck on the light pruning step.
The tutorial suggests using the the expression ‘/lights/Layout/*’, But I can't get this to work.
I tried multiple variations which do work:
  • { usd_istype(0, @primpath, “Light”) } #hardcore!
  • /lights/Layout/Fill /lights/Layout/Sun #verbose!

Can anyone suggest what I am doing incorrectly?

Cheers
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I Just had an interesting revelation …
I connected all three of the prune techniques to a switch Lop.

Now all three techniques work … go figure.

Attachments:
pruneLopSwitch.PNG (51.5 KB)

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Are you on a recent cut of Houdini? There have been times (with older builds) when the viewport render delegates could get out of sync with what you're doing.
Jason Iversen, Technology Supervisor & FX Pipeline/R+D Lead @ Weta FX
also, http://www.odforce.net [www.odforce.net]
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