Unanswered Questions
2,213 questions with no upvoted or accepted answers
9
votes
1
answer
3k
views
Creating custom node types for geometry nodes
is it possible to create custom nodes for the geometry node editor (NOT node groups, combining blender built-in nodes), define inputs and outputs and execute some python code in between? I couldn't ...
CommunityBot
- 1
8
votes
0
answers
303
views
how to write a custom projection type?
Is it possible to create a lens shader with EEVEE/Cycles ?
I'd like to have the control over the camera position and the ray direction per sample. This allows to simulate various conventional lens ...
- 60.3k
6
votes
0
answers
212
views
Scatter objects with different forms and sizes on flat surface without intersections
My goal is to make a node group that can distribute random objects over a given surface without (noticeable) intersections. I suppose the surface is flat, but it can be different forms (rectangle, ...
- 36.1k
6
votes
0
answers
141
views
Recreate Solidify Thickness Clamp in Geometry Nodes?
I am trying to build the Solidify modifier in geometry nodes. Generally this is simple as there are many ways to offset a copy of the geometry. And we have Extrude to create the Rim. However, I am ...
- 6,647
6
votes
0
answers
1k
views
Blender Geometry Nodes: How to find vertex neighbor id's and positions
Given that Blender Geo Nodes "Vertex Neighbors" nodes only outputs only the neighboring vertex and face counts and NOT the point ID's and positions, how is it possible to get the neighboring ...
- 2,364
6
votes
0
answers
977
views
How to get access to Armature pose bones info from Geometry nodes?
I have an armature with several bones, each of them I would like to use to control transforms of other objects. Normally I would either directly parent objects to the bones or use constraints or ...
- 1,111
6
votes
1
answer
4k
views
Separate alpha from color in Shader Editor
In the Shader Editor, I can create an RGB node and in there, I can set an alpha value as displayed in this screenshot:
However, no color separation node in blender supports extracting that value and ...
CommunityBot
- 1
5
votes
0
answers
68
views
GeoNodes: How to use captured positions from one set of points and offset individual mesh island positions using the captured positions
Link to the blend file (uses Blender 4.0):
My question is a little long, but hopefully with the screenshots it becomes clear what I am trying to achieve.
Here's what I have so far in my geometry ...
5
votes
0
answers
154
views
Flat shading when using displacement or bump
When using a bump or displacement node and bump only or displacement and bump in the material settings, the shade smooth option seems to not be working. Instead the geometry starts to show, auto ...
- 51
5
votes
0
answers
625
views
Is it possible to control the radius of the skin modifier with geometry nodes?
Is it possible to apply to an object (formed by only vertices) a skin modifier, and then control the radius of the modifier using geometry nodes?
This means that the object would have two modifiers, ...
- 383
5
votes
0
answers
322
views
Custom shader script in compositor (de-linearize depth buffer)
Some months ago I wrote a minimal opengl 2.5d game engine with pre-rendered backgrounds (such old Resident evil, Alone in the dark and Final fantasy games). Depth is managed through a grayscale image ...
- 3,072
5
votes
1
answer
909
views
get this gradient style in blender
I'm trying to get this gradient style:
My best result are with eevee with volumetric and gradient on a metaball, but i cannot figure out how to get the gradient fill the totally of the metaballs like ...
CommunityBot
- 1
5
votes
0
answers
698
views
Control image texture source from outside node group
I'm working on turning a cavity node setup I found online into a node group I can append to my blender files.
The setup uses several mapping nodes (that I already converted to math nodes so the ...
5
votes
0
answers
2k
views
nVidia skin shader with the Principled BSDF
I've been using a skin shader primarily based on the Brecht skin shader, which is itself based on the Sum-of-Gaussians approach as seen in 14.4.7 from GPU Gems by nVidia. Its Cycles adaptation, which ...
- 51
4
votes
0
answers
29
views
translucent white resin with embeddings - material
I need to make a volumetric translucent material, possibly working in EEVEE.
It is a white semi-translucent resin with objects embedded.
The embedded objects are more visible near to the surface of ...
- 41
4
votes
0
answers
194
views
Sub-steps setting for Simulation Nodes
In the Blender 4.0 online reference, there is this mention in the Simulation Nodes section:
In the Node Editor the inputs can be renamed, shuffled and removed. This is also the place where sub-steps ...
- 37.9k
4
votes
0
answers
74
views
Spiral Array with geometry nodes issue
I'm trying to spiral out some elements/bridges off a central column with geometry nodes.
This setup works for the most part but I get these two elements in a wrong position and rotation.
how can this ...
- 105
4
votes
0
answers
700
views
How can I create an outline around an object?
I want to use a geometry node to place a fixed number of instances on the outline of an object based on the camera's viewpoint. How can I place a fixed number of points on the outline of an object ...
- 2,364
4
votes
0
answers
218
views
Migrating geometry shaders to Metal
I'm working on BlenderBIM (architecture addon for Blender) and we have a bunch of shaders to support plan annotations in viewports. Mainly it's simple shapes based of lines - lines, segment based ...
- 456
4
votes
0
answers
377
views
Drawing non-polyline smoothed lines with `gpu` module
Backstory:
Since bgl module will soon to be deprecated and it's doesn't work on Metal already I was trying to move code to gpu ...
- 869
4
votes
0
answers
957
views
Offset and time-scale Armature animation in Geometry nodes instances
Is it possible to randomly offset and change speed of animated assets that are instanced on GN points?
I've found a tutorial on Youtube in which author duplicates assets and node groups each time to ...
- 280
4
votes
0
answers
235
views
Geometry nodes: calculate the cross sectional area of a moving object
I'm trying to model the drag force (Fd) on flying objects. I would like to make the model procedural, so in which I now choose to use points, on which I later can instance.
The drag force formula is:
...
- 575
4
votes
1
answer
793
views
How to instance a roof tiles?
Imagine that I have a mesh, that represents a quite complicated roof, consists of planar faces:
Is it possible to instance a roof tiles like this using geometry nodes?
Here is the setup that I have ...
CommunityBot
- 1
4
votes
1
answer
285
views
Is there any way to render a perfect curve just like pointclouds in blender?
When we use the 'curve to mesh' node in geometry nodes, sometimes we cannot get an ideal results because mesh overlap frequently happens and leads to bad shading on surface, just like this figure:
So ...
CommunityBot
- 1
4
votes
0
answers
2k
views
Road / street network with geometry nodes: How to get all neighbouring vertices? Fit exactly instances on curves? Deform instances to multi curve?
Tried to make road / street network system with geometry nodes in blender. Plan is to instance street / road chunks on vertices and along edges in between intersections. Mesh topology have non ...
4
votes
0
answers
809
views
any way to inspect the value of a node's unconnected output socket?
I know that you can inspect the value of the output socket of a geometry node when hovering it. That is nice.
But is there a way to inspect the value of the output socket of a node when it is not ...
- 2,550
4
votes
0
answers
469
views
How to access Split / "vertex-per-face" normals in Geometry Nodes 3.0+?
I want to use the custom normals already present in my geometry but the Normal node only seems to output generated smooth normals.
The spreadsheet only contains one normal vector per face, I don't ...
- 36.1k
4
votes
0
answers
386
views
Geometry nodes: control light intensity
I'd like to create a geometry node that automatically adds a light and configure its intensity based on the inputs of the nodes. I managed to add the light using an additional collection + the ...
4
votes
0
answers
880
views
Geometry Node: manipulate a list to create n objects
In Blender 3.0, using Geometry Mode, is there a way to create a list like [0,1,2...] and apply various operations on it (math, zip,...) ? For instance I could use ...
- 1,199
4
votes
0
answers
192
views
Custom nodes, node limits, and compile times
I am working with some very complex custom toon shaders in Eevee. This causes several problems. First, the compile times are atrocious. Second, I am in danger of hitting the node limit if I also use ...
- 6,647