Forums Technical Discussion Karma fisheye shader works on workstation but not on farm

Karma fisheye shader works on workstation but not on farm

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jlapre
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Technical Director II Matt Blackwell was able to port his beloved Mantra fisheye lens shader to a Houdini 19 Karma lens shader.
See attached example render.

It works on my Linux workstation running Houdini 19.0.531, but when I submit it to our Qube farm we get the error:

Error loading lens shader: Unable to load shader 'opdef:/Vop/fishLens?CVexVflCode'
Error loading lens shader: must have P and I as outputs.

The lens shader is defined in an HDA.
The worker nodes on the farm should be able to see the same HDA. So why can't they load the shader?

Thanks

Attachments:
houdini19.fishEye.v005.karma_polar.00001.png (1.1 MB)
Screen Shot 2022-04-13 at 8.44.11 AM.png (775.6 KB)
Screen Shot 2022-04-13 at 8.41.11 AM.png (1.1 MB)

Jeroen
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jlapre
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To give you a better idea of our qube farm submission workflow, please find attached a text file with debug steps involved.
One of our artists, Erik, suggested I try rendering from the command line, to mimic the farm.
But now it can't find Matt's Karma fisheye lens shader.
What is the difference between rendering from within Houdini, which works, and from rendering from houdini.19.0.531/bin/hython-bin?
i.e. In regards to where it looks for the HDA.
Thanks

Attachments:
2022-04-18_KarmaLensShader.txt (3.5 KB)

Jeroen
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jlapre
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Update: I narrowed down this issue to:

Karma fisheye lens shader works within Houdini, but not in hython.

I submitted this as Side Effects Support Ticket: #121309.
SideFX developers have fixed this issue for their next major release - Houdini 19.5.
They hope to release Houdini 19.5 in about 4 months.
Thanks
Jeroen
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