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

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.

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.