Questions tagged [point-clouds]
questions concerning the use of point clouds / data point sets in blender.
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Cycles generates distorted depth
The depth map generated by the Cycles rendering engine seems to have (radial) distortion, while the Blender renderer does not.
However, I could not find anywhere information on the internal camera ...
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3
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How can I create a point cloud from the surfaces of a model?
How can one go about generating a point cloud from the surfaces/faces of a model?
Initially the models are going to be fairly simple (just cubes, cylinders, and spheres), but eventually the models ...
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1
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Calculating 3D world co-ordinates using depth map and camera intrinsics
I am looking to annotate points on a rendered 2D image and then use the rendered depth map with the camera intrinsics to find where the point in 3D space is. This process is identical to creating a ...
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10
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Visualizing 3D voxel data in Blender 2.8
right now I'm trying to visualize my scientific 3D data in Blender 2.8. So blenders built in textures or smoke simulations do not lead to the goal.
I've read that older releases of Blender do support ...
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Geometry Nodes: Is it possible to connect point instances with curves? (Blender 3.0)
on my current scene I am trying to create a geometry node system that let's me distribute power poles along a street. The street is made of a curve and I can of course use that curve in combination ...
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8
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3
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PythonScript to load data as colored point-cloud
Background
I want to render 3D points with color information for scientific visualization. I have several hundred thousands of points up to 2 million. For each point I have [xyz] coordinates and two ...
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Render 3 dimensional scalar field
I have a function which assigns to "every" point in space (x,y,z) a scalar value d. I want to, somehow, visualize this function ...
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2
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Efficient way(s) to render point clouds of 3D scan datas in cycles
Problem: I would like to render a 3D scan data (so no volume) containing only vertices (no faces or edges) with colour informations in cycles.
Tried so far: I tried particles (spawning spheres on ...
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2
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What is a Point Density texture?
I see Blender 2.76 now has a feature called "Point Density" textures. Is this a particle system? If so, how is it different from previous particle systems?
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Render 100k objects each with independent color and scale through time
I'm trying to visualize some data that is essentially 100k time series, each with an associated position. I'd like to render this with each object a sphere whose color/scale/alpha is driven by it's ...
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How to emit particles at intersection of faces (Scan animation)
I want to make an animation that explains laser scanning. It will consist of two videos.
One of the videos is rotating duck with a laser on it.
You can see the animation here. The animation is by me ...
6
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1
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Setting Voxel Coordinates
I've been looking online for a long time, searching for documentation on the subject of Blender Voxel Data. So far, I know that Blender uses many file types, including the .bvox file type. For the ....
- 185
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3
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how to combine vertices into a surface
I have an array of vertices from the .obj file. I transferred it to a blender . BUT I can't create the surface.
how to combine points into a single surface ??
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Creating a Fluffy Cloud
I am trying to create a cloud like this
(taken from Is there an easy way to make volumetric clouds for Cycles?)
The closest I am able to get is
I have taken these steps:
Switch to Blender Render
...
- 173
5
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2
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Wrapping a mesh around point cloud with cavities
I have a series of point clouds I want to convert to mesh (there are points inside the object, uniformly distributed, not only on the surface).
I want to generate a model of the surface of the point ...
- 611
5
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1
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770
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Align Instances to Curve with Geometry Nodes
Using Blender 3.0.
Using the grease pencil, I've created a curve that I've then converted to a mesh (using Object > Convert > Mesh). I have a series of points that I can work with using geometry ...
- 210
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2
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Csv Import pointcloud into Blender
I have 24 points which correspond to 12 different "elements" (2 points per element) saved in an .csv file with the following column order (1: Element Name, 2: x, 3: y, 4: z).
I would like to import ...
- 667
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Blender gets very slow to draw a scene having large number of plane?
I have a very simple python script to generate planes in the scene. I want to generate 50000 planes in a scene, to compensate for unavailability of POINT primitive, so that i can render a point cloud. ...
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1
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Get Point Coordinates generated with Geometry Nodes?
Say you generate some random points using Geometry Nodes, how can you get all those point coordinates using the python api?
The only hint I have is that the point coords are located under Point Cloud ...
- 831
4
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1
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567
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Filter point cloud based on proximity to another point cloud
I'm trying to build a nature scene with geometry nodes, and I want to make sure that plants aren't exactly on top of each other. For example, I don't want grass growing inside of trees and sticking ...
4
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How can I convert a complex point cloud to mesh?
I come from this question where I have generated a Point Cloud from a simple script which I want to convert into a mesh. I see there is this question and this question, which was unfortunately marked ...
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Importing point cloud to Blender?
I have developed a 3D scanner, this is a relatively fast scan of a big space.
https://www.youtube.com/watch?v=FHAK1L_AQig
The scanner works great. it Provides text files in X; Y; Z format
The only ...
4
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1
answer
260
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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 ...
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0
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Point cloud animation
I have around 5500 .ply files, which amount to about 7 GB of point cloud data; each file is one frame of animation.
Is there any feasible way of importing this into blender for processing? I am ...
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Is there an easy way to import point clouds with colors in Blender 3.2?
I studied a couple of videos (it seems to be on this topic), but I failed to achieve something.
For example, I have a cloud in Metashape and I want to convert it into a blender.
If there is no such ...
3
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1
answer
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Programmatically generate random point-cloud within solid mesh
I think I'm nearly there, thanks to two super scripts from CoDEmanX.
The first script shows the bounding box around an object:
...
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3
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1
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600
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Geometry Nodes: Phyllotaxis using Repeat Zone as a For loop
I would like to make a pattern of points following a phyllotaxis (like on a sunflower).
The algorithm I use is:
...
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3
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2
answers
1k
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deleting a fraction of vertices from a point cloud mesh
I have an object in my scene which is basically a point cloud, i.e. all vertices, no edges or faces. I'm trying to select a random fraction of this point cloud. Here is what the data looks like.
<...
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creating n random points on face of mesh
I'm trying to select 400 or so random points on the face of a mesh using a script (just on the face, not inside the volume) but I'm not sure how to do that.
I've tried looking into the following ...
- 137
3
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Is there an alternative to point density for rendering with GPU?
Finally working with some clouds. Rendering is horribly slow with my i5 CPU, would be much better with a GTX 970, but if I try that then shaders that use point density no longer work. Is there a good ...
user8158
3
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3
answers
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Draping 2D image over point cloud or mesh
I'm new to blender and could not find this in help files. Can blender be used to drape a 2D image onto a 3D point cloud or mesh? If yes, can someone point me to a tutorial on that?
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How can I prepare a point cloud for visualization in Blender using MeshLab?
I have access to some laser scanned LAS files. I can convert the LAS files to X, Y, Z point clouds using LASTools. Once a point cloud is in an X, Y, Z ascii format it can be imported into MeshLab. I ...
beatsforthemind
3
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1
answer
64
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How can I create a static "particle cloud" within a fixed volume?
The task
Ok, so, the title of this question is relatively abstract, but what I would actually like to do is pretty specific. Yesterday, I asked in a post over at graphic design, how I could recreate ...
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1
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How to Generate surface from points [duplicate]
Hi Guys,
I have a set of points in 3D. How can I convert this into a surface ?
3
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1
answer
2k
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Exporting camera tracking markers from Blender
I am trying to use blender to do some matchmoving and then export the camera along with the tracking markers for use in other software. After getting a successfull track, I have created a vertex cloud ...
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3
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1
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561
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Efficient Rendering of Many volumetric particles
I am working on a research project utilizing blender to visualize realistic clouds generated from a Large Eddy Simulation. I've been able to do so in limited respects.
These images, while pretty, ...
3
votes
1
answer
565
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Numpy / lidar point-cloud to mesh: How to separate polygons?
I have lidar data in numpy structured array with x,y,z and other lidar specifics that I can use to colourize and display.
I have got pretty far on the numpy side for filtering the points down (near, ...
- 41
2
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2
answers
389
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Object instance on single point using vertex group. Blender 3.2.2
I'm a complete noob with blender and just started learning geo nodes. I'm following this tutorial https://www.youtube.com/watch?v=GHGokQoqVb8&t=421s and I know it's for an old version of Blender ...
- 23
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1
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Rotate instances to face one object with Geometry Nodes
I've created a dense forest of plane image trees using Distribute Points on Faces and Instance on Points nodes.
I'm attempting ...
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2
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1
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Is there a way to transfer an attribute value from a point to the instance (or the "realized" vertices of the instance)?
I have a curve with control points on which I'm going to instance spheres that are going to have shifting scale values (that is done) and hopefully shifting materials (and here I struggle).
So I ...
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Curve from a set of points
I want to make 3D visualisation of a neuron. How can I plot curves from a set of points ? The data is shown in the image.
I found an artist created a mesh with this data. Same posted below.
Data is ...
2
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1
answer
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How to recreate a "point cloud sandbox" effect in blender?
I wish to recreate this effect with particles.
Having the point cloud reforming the object after interaction with a field.
http://pointcloudsandbox.cornflex.org
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How to correctly import whitewater particles from fluid simulation (FLIP fluids)?
I exported a FLIP fluids simulation to Alembic (.abc) and imported it into another blend file.
The fluid itself works fine however the whitewater particles are not visible.
According to the docs, I ...
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1
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Most efficient way to remove unwanted vertices in an object with 59,000 points?
I have imported a 3D-scanned .OBJ file from KScan3D, which is 3D scanning software. I am trying to scan a model car, but would like to remove all the unnecessary points for the purposes of 3D printing....
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Can't export point clouds as a ply file
I want to export vertices (no mesh exists) as ply file. However, after exporting the data by File->Export->.ply, the generated ply file contains no vertices. Can anyone help? I'm using blender 2.8.
...
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Geometry Nodes - Optimizing mesh instancing on a patchy grid
I have this generated selection of points that I'm instancing meshes onto, they are in a grid pattern but not all spaces on the grid contain a point.
What I want to ask is if it's possible to cycle ...
- 21
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1
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3k
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Use point index in geometry node distribution
I'm playing with geometry nodes here and I'm trying to create a way to kinda script the position of each point... for that i'm thinking of creating an attribute that would work as index, something ...
2
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1
answer
2k
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Geometry Nodes - Point Cloud from custom XYZ coordinates?
I'd like to create a point cloud using the Geometry Node Editor based on my own custom data.
The data is stored in a .txt file, plain [x,y,z] coordinates and looks like this:
...
2
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0
answers
142
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How to removing internal meshes from the stack of cubes?
I have a created a model with a stack of cubes that forms one big single model. There are so many unnecessary faces and cubes present inside the model. I have to remove all the internal faces to ...
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781
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Is it possible to turn particles into points/point cloud?
Now with the release of 3.1 and point clouds. I was wondering if it's possible to convert particles to point clouds and render them as point clouds. This seems like it would be much more efficient ...
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