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How do I replace the deprecated Attribute Mix node from 2.93 in blender 3.3 using a vertex group as a kind of falloff for the scale of distributed instances on points.

I am trying to follow/replicate Jayanam's 2021 tutorial https://youtu.be/yl2dtMbI--k?t=475 I almost finished it, except the 2 min. part.

The first screenshot below came from the original scene in v.2.93 and the second is where I am stuck in 3.3. Since there is no Attribute Mix node anymore I couldn't figure that out despite many tries... Any help or direction appreciated.

Geo nodes in blender v. 2.93 Geo nodes in blender v. 3.3

quellenform
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sbgraphic
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  • https://blender.stackexchange.com/q/273541/145249 – quellenform Oct 03 '22 at 23:06
  • yes thanks I've seen this but still not easy to interpret those for a beginner like me. Actually watching Overview of Node Changes in Blender 3.0 now https://blender.stackexchange.com/questions/254871/overview-of-node-changes-in-blender-3-0 – sbgraphic Oct 03 '22 at 23:28
  • The Attribute Mix node has been replaced by the Mix node. – quellenform Oct 03 '22 at 23:38
  • Yes I know but where do I connect a vertex group and a scale attribue there ? That's were I am lost... – sbgraphic Oct 03 '22 at 23:50
  • You don't really need a Mix node here (this node actually mixes two vectors/RGB-values), you would just have to use the math node Multiply and multiply the value of Random Value by the factor (or vertex group). – quellenform Oct 04 '22 at 00:01

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OK, I have now rebuilt this for you in version 3.3, and the solution should look like this:

enter image description here

Here I use instead of the node Attribute Mix the node Mix.

By the way, in Blender 3.2 and 3.3 this node is called MixRGB and is located in the Color category. In Blender 3.4 there is an additional new node that explicitly mixes values. This is called Mix and is located in the category Utilities.

enter image description here

Alternatively, as already mentioned in the comments, you can directly multiply the value of the vertex group with the randomly generated value of Random Value:

enter image description here


(Blender 3.2+)

quellenform
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  • Wow ! Many thanks for everything! I've learned a lot ! I missed totally the Name_Attribute node too... now I have something weird in my scene with the VertexWeightProximity modifier and Lowest/Highest settings because my scale is I guess different, but I will figured that out. – sbgraphic Oct 04 '22 at 17:09