As can be seen from the attached image, I'm getting a red noodle immediately after using a Compare node. This isn't entirely surprising, as I'm obviously trying to connect a diamond with a circle at that spot. However, as can be seen, I'm using a Sample Index immediately prior to that, which I thought was the way to obtain the specific attribute value that I need to use in the Compare node. As such, I'm now very confused about what's actually going on here and what I need to do to fix it. So, any suggestions? I'm using v3.4.

Thanks in advance.

Node group with dashed red noodle after a Compare node

  • $\begingroup$ I think you want to plug a single value node in the Sample Index's Index input $\endgroup$
    – Gorgious
    Commented Feb 9, 2023 at 17:06
  • $\begingroup$ I can see that this would make the red noodle go away, but I don't think the nodes, as a whole, would work as intended then. I want to evaluate an attribute on each of the point features, to decide whether they're going to be output or not. So, I surely need the index for that? Maybe the Switch node isn't as versatile as I need it to be. I'm not sure what the alternative to that is, though. It's hard to know what to look for. $\endgroup$ Commented Feb 9, 2023 at 17:19
  • $\begingroup$ As long as you feed the node Sample Index with a field, you will always get a red line. Switch requires a single value for a geometry. You can force this by feeding the Sample Index node with a single value at the Index input. Read more here: blender.stackexchange.com/questions/274557 $\endgroup$
    – quellenform
    Commented Feb 9, 2023 at 21:13
  • $\begingroup$ It depends on what the switch node is linked to. You may want to populate a boolean field with True / False and use that as a selection mask on a instance on points node for instance ? $\endgroup$
    – Gorgious
    Commented Feb 10, 2023 at 6:49


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