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Questions tagged [geometry-nodes]

Use this tag for questions regarding Geometry Nodes, a modifier added to Blender in version 2.92 to manipulate geometry in a Blender scene.

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0 votes
1 answer
11 views

Show/Debug Normals from an "Object Info" node - use those normals as input for a displacement GN network

Is it possible, in a Geometry Nodes network, to retrieve the normals from a given Geometry "Object" different from the Geometry that holds the GN modifier. Currently, I have made a "...
0 votes
1 answer
10 views

UV dependency of hair nodes

Are hair or fur grooms created using hair nodes dependent on UVs or can they be made on a mesh that doesn't have UVs?
0 votes
1 answer
46 views

edge detect : geometry node

the tree, in the image below, of Geometry node is a displace. How can I perform an edge detect to apply the displace changes only to the edges? without disregarding the displacement of the rest of the ...
30 votes
1 answer
14k views
+500

Can't find the node! Which node is available in which Blender version?

It's not hard to lose track of all the Geometry Nodes in Blender, especially since names and function have changed over time. ...But honestly, it's getting pretty tedious. Many tutorials talk about ...
2 votes
1 answer
18 views

Expand Selection of Nearby faces by Level through Geometry Nodes

I'm trying to find a way to expand the selection of nearby faces within geometry nodes. For my case, I'm beginning with a select number of faces created from a ...
3 votes
1 answer
28 views

Randomizing Z Position for Stacked Rows in Repeat Zone

I have created a Geometry Nodes setup with a Repeat Zone to duplicate instances randomly along the X-axis and stack multiple rows on top of each other. A fixed stacking value is given so that each row ...
3 votes
1 answer
330 views

Geometry Node Attribute Unusable on Density (Shader Nodes)

I've found something weird. I have an Fac Attribute in my geometry nodes (it's a simple gradient). When I use it in Shader Nodes, it works, but not for the density value on volume absorbtion or volume ...
1 vote
0 answers
38 views

Tilt curve to face object

Update: please check the end of the post I may have found a solution. I'm making a node tree whose purpose is to tilt the points of a curve so they face a reference object. A Plane is generated from ...
1 vote
1 answer
35 views

Randomizing Stacked Rows of Cubes in Geometry Nodes with Fixed Start and End Constraints

I have created a geometry node setup that places cubes along the X-axis with random positions and sizes using the accumulate field node. I need to place these cubes to match the total length of a ...
0 votes
0 answers
29 views

How can I get the orbs to stop jumping around?

Made with GeoNodes. How can I stop the orbs from jumping around? Version is Blender 3.1. Video Link: https://youtu.be/asyiEA4VYm0 File Link:
0 votes
0 answers
25 views

cutting faces in geometry nodes

What is the best method to cut faces in geometry nodes? I'm trying to create geometry and distribute it across a face for a 3d printable textured surface. Is there an equivalent to knife project? ...
1 vote
0 answers
25 views

Move instances on curves using geometry nodes

I have a simple set up where I am generating some curves using geo nodes. I want to move my instances on these curves but I am not able to figure out how to move all of them in one go. For a single ...
0 votes
0 answers
26 views

Boolean difference error in Geometry nodes

I'm trying to distribute geometry across a face to create a textured surface suitable for 3D printing. I understand that Knife Project isn't available in geo nodes so I've tried boolean. I create ...
0 votes
0 answers
23 views

Particle effect on Instances

I am trying to make a particle effect on the flowers (instantiated using geometry nodes) on the skull mesh: I tried doing it in geometry nodes, but the random points distributed on the flowers do not ...
0 votes
0 answers
38 views

What is The Best way to trace image to carve inside geometry nodes

I tried several ways to trace image inside geometry nodes , I knew that I can trace image with grease pencil , but I need a way to update image coordinate instantly inside GeoNodes , my result came ...
0 votes
0 answers
27 views

What would be the best way to do this inside geonodes? Should I create a rolling cube simulation zone and use that as an instance? [closed]

So What would be the best way to do this inside geonodes? Should I create a rolling cube simulation zone and use that as an instance? or is there a way to add simulation nodes to instances and then ...
0 votes
0 answers
15 views

How do I smooth out a Geometry Nodes spline that has a profile? [closed]

I'm working on making hair for a character and need a gradient color ramp which I could only find to be used with Geometry Nodes. While both strands of hair in the picture use the same spline, the ...
1 vote
1 answer
30 views

Geo nodes set Curve Normal > free, unexpected result [closed]

I'm trying to make something in GeometryNodes but the normals are giving me hard time, First, there is flat straight curve (Group input) with Curve to Mesh and an Arc curve as profile, and this fine (...
1 vote
1 answer
49 views

Decrease Instances count by length (Different Object) - Geometry nodes

I asked a similar question some days before. With that way in answer, it works fine. However, that example requires Instances within the same geometry node. Now I have to take instance from another ...
7 votes
2 answers
634 views

How to create a Sierpinski Dodecahedron fractal

I can create a Menger sponge fractal using geometry nodes. See Blender file below: Now I'm trying to create a Sierpinski Dodecahedron I tried to replace the cube node with a Dodecahedron created as ...
4 votes
2 answers
355 views

Spiral between Points [GN]

Hi I need some help with spiral to transform it between start and end point
0 votes
2 answers
32 views

Python: Create a Geometry Node set up to join multiple Objects

Is it possible to use a python script to generate a geometry node set up like this? As in, selecting all the objects, with the cube as the active, and then running the script to automatically generate ...
0 votes
1 answer
33 views

Python: Link Join Geometry node and Group Output

I have this code that creates a bunch of Obj Info nodes and joins them with a join geometry node. It is supposed to end by linking the Join Geometry node to the Group output node but it's failing to ...
1 vote
1 answer
46 views

Geometry Nodes grow a premade branching curve in parallel

There is a branching curve made manually. With geometry nodes, how can it grow so that every time it splits, the growth is continuing parallel? The arrows show the desired growing direction.
2 votes
1 answer
56 views

How to determine whether the FCurve array_index is targetting a specific property?

This question is within the context of Geometry Node and drivers. Using the Python API, we can retrieve the drivers associated to Geometry Nodes of a given node tree this way: ...
4 votes
1 answer
53 views

Hide occluded vertices

Background Using Blender 4.1 and a wireframe modifier to project a mountain mesh as a blueprint. Subterranean structures must remain visible. I'd like to remove parts of the mountain that aren't ...
1 vote
1 answer
696 views

Geometry Nodes: attribute modulo 2 is 2?

Noob on Geometry Nodes. I'm trying to find out if a float attribute is odd or even, so I'm using Modulo. It works well, except when the attribute has a value of $2$, which is giving me a result of $2$ ...
2 votes
1 answer
68 views

Curve Tangent direction always changing depending on extrude

my problem is that the curve tangent changing all the time the direction depending when I extrude one of the edges of a pre existing face: How do I prevent it from changing all the time?
0 votes
0 answers
18 views

Keep Stroke Width of Curve in GN [duplicate]

I want to add some stoke along curves, they have some angles. It can be done in panel Bevel.They have the same width. But when I use Curve_To_Mesh in GN, the width changed. How to get the same result ...
1 vote
1 answer
39 views

Spawn unique instance per point

I'm trying to instance a collection of images, such that each point has a unique image. When using a mesh to points node to create the points, everything works fine when set to Vertices, Corners, or ...
0 votes
0 answers
31 views

Project Curve on Mesh - Geometry Nodes

I'm using geometry nodes to project an open curve on a mesh that is not flat. I have used raycast node but can't project the curve along normals (like a polygonal object). I have tried connecting the ...
3 votes
1 answer
59 views

Constrain a Bounding Box Within Another Using Geometry Nodes

First post and very new to geometry nodes, so I might be way out of my depth here. What I want to do: Here is two bounding boxes generated in geo nodes from two different objects. I want to constrain ...
2 votes
1 answer
30 views

Is there a way to select the vertices of a mesh by the local axes of another object in geometry nodes?

I want to split the objects in a collection with a boolean and transform one side. In this case, it seems to be common to use mesh islands to separate geometry. But this is not useful in this case, ...
3 votes
1 answer
47 views

How do I delete all vertices above a line with Geometry Nodes?

I am learning to use Geometry Nodes. I have a triangulated grid with corner vertices at $(0, 0, 0)$, $(1, 0, 0)$, $(1, 1, 0)$, and $(0, 1, 0)$. I want to delete all vertices (and faces and edges) ...
3 votes
2 answers
139 views

Is it possible to animate a transition between two XYZ Math Surfaces?

Using the Add Mesh: Extra Objects add-on, I have set up a group of XYZ Math Surfaces Add > Mesh > Math Function > XYZ Math Surface which generate various parts of a single mesh object, with ...
0 votes
1 answer
46 views

How to get a random number only once per instance, in stead of for each vertex, in geometry nodes

I've built this rather complex way to create a box with tape on it in geometry nodes. This is because I need to create many different boxes according to specific size profiles. The setup works but I ...
0 votes
1 answer
269 views

How can I mask a Hair Modifier using a texture image? Vertex groups not working with hair

I'm relatively new to blender. I've found countless videos showing how to weight paint a vertex group or how to create one selecting the vertices and then use the group in the Factor value of many of ...
0 votes
1 answer
33 views

How to reset or reverse instance transform without Realize Instances node?

I'm trying to reset or reverse instance scale. I have 3 Instances attach on Main object. Main object takes A as Instance, A takes B, B takes C. I set a group input named Scale Fac to scale instance (...
3 votes
1 answer
62 views

Mesh created with Geometry Nodes is slightly shifted compared to mesh created with XYZ Math Surface

I was trying to complete my answer for this question. I'm creating an XYZ Math Surface via Add > Mesh > Math Function > XYZ Math Surface using the following parametric equations: ...
2 votes
0 answers
38 views

Geometry nodes reorders UV layers when using Join node

When using the Join Node and a vertex group of geometry I duplicate and join, UV maps are reordered. How can I ensure the UV layers maintain the original order when using Join Geometry Node? When ...
2 votes
1 answer
149 views

Menger Sponge Fractal creates weird outline on Cube surface when using Cycles

So I have very recently began to mess around with Geometry Nodes in Blender and since my scene required the usage of a Menger Sponge Fractal, I followed a YouTube tutorial to make sure I learned some ...
1 vote
0 answers
37 views

How can I preserve Driver links between an add-on and Geometry Nodes?

Blender 4.1 makes it possible to create a Driver between an add-on driven value ("Copy as New Driver") and a Geometry Node value ("Paste Driver") but the link is working only ...
1 vote
2 answers
44 views

Proximity colors between instances of a same pack

I'm trying to do a little effect where instances (any kind) on points would change their color based on the proximity of another instance. Thanks to some tutorials and questions here, I've ...
1 vote
0 answers
32 views

Geometry Nodes: Is it impossible to make precise dimensions in this steel frame prototype method?

The goal with this node setup is to add geometry to edges and make them look like steel frames. The method bellow works well, but there's a problem, it's only precise for cubes. Anything different ...
0 votes
0 answers
20 views

Why Does Geometry Node Mesh Boolean Work for Some Objects But Not Others?

I am using Blender 4.1, and am trying to create an animation in which an object is only visible while it is in the interior of a cube (which will be made transparent). To do this, I've created a very ...
2 votes
2 answers
106 views

How can I make the edge geometry fully join?

I want to convert edges into steel frames and ensure they are connected. On the left is a default cube with Geometry Nodes - the problem is that the new geometry of beams/edges doesn't fully join like ...
5 votes
1 answer
228 views

How to select a boundary edge and generate an outline

I'm looking for two features in Geometry Node: Is there a way to select edges and convert them into a curve/solid outline Is there a way to specifically select edges that are on the border, as in ...
3 votes
1 answer
167 views

How to create border outline?

I tried many different ways to create a border outline for my objects. The outline helper add on, to duplicate the meshes and convert the border edges to grease pencil and I tried Geometry Nodes. But ...
4 votes
3 answers
399 views

Create repeating geometry across a face

I'd like to create repeating instances of geometry over a single selected face of an existing mesh. Such as the small square cutouts in the pictured panel: I cannot use a material because the result ...
2 votes
0 answers
32 views

How do I add delay to the effects of a geometry node?

I am creating a robot with 8 identical arms arranged in a circle (a bit like an octopus). I have modelled and rigged one arm, then I made a simple geo node modifier which rotates the arm separately by ...

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