pre-render raise ValueError

[com48]

Hey guys,

I'm trying to stop my rendering of a rop. i'm calling a python module on disk and no matter what I try it will not influence the render of the output.

raise hou.ValueError()

sys.exit(1)

return 1

nothing seems to influence the rop.

is it possible to stop a rop from rendering with python or hscript from the pre-render field? or is there a better way of doing this?

greetings,

Lars

[hopbin9]

You can use a Switch node, and put a Null as Input1, and the Mantra node as Input2.

Then use hScript or Python in the Switch to select which input to use.

[com48]

so it seems that the pre-render script and the pre-frame need to raise a error to stop a node from rendering.

raising a error on the pre-render will stop the node from rendering the next node in the chain.

raising a error on the pre-frame will stop the node from rendering the current node.

hope it helps someone else.

greetings,

Lars

[hopbin9]

How do you raise an error in a script? That's something I've never done.

[com48]

How do you raise an error in a script? That's something I've never done.

set the pre-frame script to python and type:

raise Exception("STOP!") #Hammer time

Stops the node.

adding it to the pre-render will stop the next node from rendering but not the current node. SESI informed me today the fix the bug i reported yesterday so todays build should have some of this weirdness solved.