Changing amount of instances scattered based on height

Question

I am trying to scatter instances on a mesh, but I want to be able to control the amount of instances scattered based on the height they are on the mesh.

How would I accomplish this? (I have a feeling it has something to do with Vectors and the Color Ramp node, but I don't know.)

https://blender.stackexchange.com/questions/285896/whats-the-best-method-to-model-this-atomizer-with-varying-size-and-thickness/286105#286105 — Emir, Feb 17 '23 at 14:06

score 4 · Accepted Answer · answered Feb 17 '23 at 14:07

4

Should be like this one:

The important point is that Density is calculated per face. So you have to have enough polygons to do that (That's why I've added subdivide mesh)

answered Feb 17 '23 at 14:07

Crantisz

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I'll try this out later today. Thanks! – BlenderMaster15 Feb 17 '23 at 14:09
That's how I would have done it as well. – Gordon Brinkmann Feb 17 '23 at 16:08

fleity · Answer 2 · 2023-02-20T15:28:56.517

-1

You could also try to change the input to the Selection slot on the Instance on Points node based on your height value. Something like height - randomValueZeroToOne * height * modifier > threshold could work.

edit: image of setup as requested in comments You can use the value, B input of compare node or the float curve in the threshold group to control die distribution (the float curve isn't really that necessary but gives a very nice and specific control)

edited Feb 20 '23 at 15:28

answered Feb 17 '23 at 14:41

fleity

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Do you mind sharing a screenshot of this node setup? – BlenderMaster15 Feb 17 '23 at 15:18
Sure thing, too bad I can not upload the blend file :-/ I don't really get why this post got downvoted.. except maybe that it took me two days to reply? – fleity Feb 20 '23 at 15:30

Changing amount of instances scattered based on height

2 Answers2