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I'm trying to use geometry nodes to scale up a duplicate mesh along each faces' normal to "thicken" up the mesh. This can be achieved manually by scaling a mesh with Alt+S (Scale along face normals).

This picture (green) shows what I'm trying to achieve through the Geometry Nodes (manually scaled along face normals): Scale Along Face Normals

Here is an example of why a simple transform won't achieve the effect I'm going for: Normal Transform

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    $\begingroup$ Just to clarify, are you looking to scale along normals, or extrude along normals? $\endgroup$
    – Christopher Bennett
    May 28, 2021 at 0:22
  • $\begingroup$ Just looking to scale $\endgroup$
    – BenignBrett
    May 28, 2021 at 0:39
  • $\begingroup$ what would be the difference to scale the mesh!? $\endgroup$
    – Chris
    May 28, 2021 at 10:01
  • $\begingroup$ since now 2 people don't understand what you mean you should include some screenshots/paintings what you want to have $\endgroup$
    – Chris
    May 28, 2021 at 10:02
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    $\begingroup$ Yes. My use case is that in a geometry node I am grabbing all objects in a collection, duplicating them, and scaling them all up along their normals. $\endgroup$
    – BenignBrett
    May 28, 2021 at 18:48

1 Answer 1

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Is this it?

2 Attribute Vector Math nodes, and 1 temporary attribute to hold the offset.

enter image description here

'Scale' along normals might (strictly) be a misnomer... Solidify, Displace, and AltS all translate vertices along normals.

In GN 'Fields', (Blender 3.0+) that would be:

enter image description here

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    $\begingroup$ That did the trick. Thanks! $\endgroup$
    – BenignBrett
    May 28, 2021 at 21:02
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    $\begingroup$ "Warning: This node is considered legacy and will be removed in Blender 4.0.": docs.blender.org/manual/en/latest/modeling/geometry_nodes/… Also, I can't find it in Blender 3.0... $\endgroup$
    – Johan Walles
    Dec 18, 2021 at 16:28
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    $\begingroup$ @JohanWalles Thanks! Edited. Must root out all pre-Fields GN answers. $\endgroup$
    – Robin Betts ♦
    Dec 18, 2021 at 16:39

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