This node setup is meant to generate routes for drops of water. It wraps curve lines on the surface with the geometry proximity node.

Setup Result
enter image description here enter image description here

I would like each control point (except the first one) to inherit the previous point's X and Y position before the proximity is evaluated. I tried to use both "field at index" and "transfer attribute" feeding them with index-1 but it's not working: enter image description here

Also, if I try with a "sample curve" approach like this. enter image description here I would expect to get the same result as in the first picture, but it's not.

This is the blend file:


1 Answer 1


This one does it:

node setup

Control points before:

control points before

Control points afterwards (take a look at index 1000):

control points afterwards


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