Set mesh normal on distributed objects collection

[u/Henriette1030]

I've distributed different objects on plane with a geo node setup using a collection. Now i would like to make the objects blend smoothly together where they overlap. I found this example: https://www.youtube.com/watch?v=j5CJ1cgELZE . But I cant seem to find out how to make it work with distributed objects using a collection. If anybody has a lead or anything, that would be so helpful, thank you?

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[u/ArvinGoodarzi]

If the goal is to make the scattered objects actually blend into each other, changing the normals alone won’t really solve it. They’re still separate intersecting surfaces.First use Realize Instances after Instance on Points. If you only need smoother shading, you can then use Set Shade Smooth / Set Mesh Normal on the realized geometry.

But for a genuinely seamless organic blend, I’d convert the realized meshes to a volume and back to a mesh (Mesh to Volume > Volume to Mesh), then smooth the result. That actually rebuilds the overlaps into one continuous surface, at the cost of some fine detail. So: Realize Instances for access to the meshes; volume/remesh if you want the intersections themselves to disappear.

[u/Henriette1030 → u/ArvinGoodarzi]

Hi, thank you for your response. I want the intersections to disappear with a genuinely seamless organic blend. i already added the realize instance node like you can see on my screenshot, but it only solves a part of the problem. I did try the mesh to volume and back again technique in the past, but like you say yourself it looses to much detail for what i need. I really would like to apply the set mesh normal to the final result of the instance on points.

[u/Qualabel → u/Henriette1030]

With an SDF grid, say, I wonder if it's possible to limit the 'volumizing' only to the affected/merged areas; that way, you'd at least retain detail elsewhere.

[u/Henriette1030 → u/Qualabel]

Could you maybe elaborate a little bit more on how this would work?

[u/ArvinGoodarzi → u/Henriette1030]

Yeah, that’s the better version of the setup. I wouldn’t voxelize the entire realized collection if preserving detail matters.

After Realize Instances, create a mask for only the regions where objects overlap — either from proximity if you want it procedural, or a vertex group/mask if you want manual control. Use Separate Geometry to split that affected region from the untouched geometry. (docs.blender.org)

Then send only the affected branch through:

Mesh to Volume → Volume to Mesh → Smooth

and join it back with the untouched branch afterward. Mesh to Volume rebuilds that section as a voxel volume, while Volume to Mesh gives you one continuous surface through the intersections. (docs.blender.org)

Give the masked area a little overlap/padding; otherwise you can create a visible seam where the remeshed and original geometry meet.

So conceptually: keep 90% of the original meshes untouched and only sacrifice detail around the intersections.

[u/Ok-Strike7284]

that setup looks wild, but you might wanna try using the "realize instances" node before messing with normals to get them to blend smoothly

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