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Confusion about CHOPs

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Alright so I'm just starting to learn about C HOPs and now I understand the basics of it. From what I've learned, all my CHOP networks end with either an export node or a rename node. However, when I right click on parameter > Motion FX...


…I get this node tree


I have two questions :

1) How does it "export" the data without an export or rename node? I checked the wave node and saw this as the channel name : 'run("chopls ../wave_transform1_clip1")' Not sure what this means or how it works as the export.

2) The math node is set to Combine CHOPs : Add. I know how adding channels are like, but what does it mean to add two CHOPs together?

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@SohailNordin here its starting point Files ..different methods to answer you question (just find Geometry Folder)
C:/Program Files/Side Effects Software/Houdini 19.0.383/houdini/help/examples/nodes/chop/

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