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TL;DR How do I transfer attributes from one geo node on one Object to another geo node on another Object?

Hey guys, trying to write an attribute in a node tree that is used on one geometry node modifier on one Object and then read that attribute in a different node tree used in a different geometry node modifier on a different Object so that one Object can act as a data source for multiple other Objects.

The way I'm trying to do this right now is according to the below diagram. The problem I'm having is demonstrated through the red lassoing in that I am expecting to be seeing (1,1,1) for my Sample Index node out field, but I am rather seeing (0,0,0): A diagram walking through how I want to transfer an attribute from one Object to another.

I don't understand enough about Geometry Nodes to know why the above doesn't work, but learning from previous questions I've posed to this website I'm this time going to include a .blend file for those more knowledgable to explore right away which those interested can find at the top of the post.

Thanks for reading!

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    $\begingroup$ In "PostModifierScaling_Source" graph, try to add a "Geometry to Instance" node between "Group Input" and the first "Store Named Attribute" (the one with "postModifierScaling_factor") nodes. The issue seems to be that you store attributes in "Instance" domain, but you have no instance (check in the Spreadsheet Viewer...). $\endgroup$
    – StefLAncien
    Commented Feb 12 at 22:39
  • $\begingroup$ @StefLAncien My tree still isn't working BUT that did resolve the crux of this post in that I'm now getting (1,1,1) when reading the relevant attribute, so clearly something else is wrong that I'll have to look into. TYVM! $\endgroup$
    – Spring E. Thing
    Commented Feb 12 at 22:43

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To quote user StefAncien,

In "PostModifierScaling_Source" graph, try to add a "Geometry to Instance" node between "Group Input" and the first "Store Named Attribute" (the one with "postModifierScaling_factor") nodes. The issue seems to be that you store attributes in "Instance" domain, but you have no instance (check in the Spreadsheet Viewer...).

Doing as such resolved the issue my question posed, although my specific tree still isn't working, but that's for my own investigation from here.

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