Questions tagged [point-clouds]

questions concerning the use of point clouds / data point sets in blender.

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12 views

.ply rendering in 2.9

I have a .ply file and I simply want to render it in Blender 2.9. I can import it as a .ply and I can see it in the viewport but I have no output in Render. I tried the Point Cloud Visualizer plug-in ...
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16 views

How can I disable interface smoothing of point clouds in 2.9?

I am working with point clouds and for a greater precision need to match viewport's point drawing of Blender 2.91 to 2.79. Here is a comparison between them (Object mode): As you can see newer ...
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1answer
22 views

Mesh of vertices shown in viewport but not in render: how to render?

I have a mesh which only consists of vertices. The mesh is essentially a point cloud. I can see the object in the viewport but I can't render it. I want to create a quick animation video where the ...
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37 views

Least Squares Fitting of geometry on point-clouds

I use Blender to process meshes built from points clouds. The bigger problem is to make a good reconstruction (retopology) starting from a mesh with millions of points, often not following a regular ...
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26 views

Baking alembic pla animation

So I have the .abc file containing some geo with PLA animation. I want to convert alembic into pla keyframes inside Blender for further manipulations, how can I do that?
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23 views

Blender custom point density from file

I'm scoping out solutions for rendering custom volumetric data that I'll be parsing from some external source (a simulation being run externally to Blender). I'd like to use Blender's volumetric ...
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54 views

Render Point Cloud and Edges

Objective Vertices and Edges from file to create network similar to this Image style. Next step would be to calculcate new positions for the vertices or new time-based array for new vertices to create ...
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1answer
33 views

How do I set point density node for smoke?

I’m trying to make this animation , I’m using particles from an emitter to create the smoke and force fields to give them the direction I want . The problem is I’d like to shade the smoke as it was ...
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17 views

How to combine multiple .OBJ point cloud files into one point cloud?

I noticed that we can combine multiple OBJ meshes with this answer, but I don't know how to do this with point clouds. I have several point clouds that represent partial scans of an object and I ...
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1answer
268 views

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 ?
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1answer
117 views

Stopping a point cache bake

I have a problem with blender sometimes: when I am running a simulation bake of some kinds, i.e. the point cache bakes, Blender will not allow you to interact with the interface at all. This is not ...
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28 views

Weight-paint vertices without mesh in 2.81

Context: I'm trying to annotate point cloud data. Is there a way to weight paint individual vertices that are not in a mesh? In the image below, all vertices belong to the vertex group 'Group'. ...
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1answer
31 views

cannot get wisps on ghost with point cloud node in blender

So I am trying to create a cool ghost pony with a particle system with a wind force and vortex behind it that blows upon the pony. I limited the particles life span to end just past to the pony so ...
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1answer
46 views

Is it possible to procedurally render a mesh by generating a cloud of 3D RGB points?

I want to render monsters by procedurally generating a cloud of 3D RGB points representing their bodies. In other words, I want to be able to create a function: ...
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1answer
425 views

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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1answer
310 views

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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1answer
255 views

Calculate Faces from Point Cloud with Python

I have a bunch of vertices in a point cloud stored in an obj file (i can change the file if need be). How do I calculate the faces from the point cloud using python? Example: ...
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2answers
153 views

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 ...
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485 views

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 ...
2
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1answer
507 views

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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1answer
684 views

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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0answers
79 views

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 ...
19
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1answer
673 views

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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134 views

Calculate 2.5D point cloud from scene

Ich would like to generate a 2.5D point cloud of a scene from the camera's perspective with python. Let's say the camera has a rosolution of [n,m] pixel and as a result I want to have n*m 3D vectors ...
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754 views

How to make a mesh from vertices/points via triangulation?

I have a set of points which each of them can be represented as bezier curve. What I need to do is to make a mesh from them. Probably this meshing algorithm must be based on triangulation. However my ...
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1answer
265 views

How do I make a luminescent gas cloud?

How can I make a luminescent gas cloud, similar to the one shown in the picture below (labeled "Trapped Atoms")? Thank you.
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2answers
967 views

Assign colour to vertices given face texture, and enable conversion to a point cloud

I'm a-bit of a Blender newbie here so please forgive me if what I'm about to say sounds stupid, but I've been trying to solve this issue for far too long now and am becoming way too frustrated...so, ...
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1answer
271 views

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, ...
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1answer
800 views

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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3answers
1k views

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 ...
4
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1answer
681 views

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 ...
5
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1answer
1k views

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 ...
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1k views

How to create faces/edges from vertices/points?

I can easily delete the faces and edges using delete only edges & faces option. It would be nice to have the possibility to reverse this operation. Is there a way to create an universal script ...
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1answer
985 views

Creating a static smoke, saving it and making it interactable

I've created a smoke simulation using quick smoke, I adjusted the values to my liking and ran the sim. (plane of smoke with a collider cube piercing it and the smoke being moved by the cube.) The sim ...
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2answers
777 views

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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1answer
696 views

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 ...
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1answer
1k views

Using 3d scanned textures

I have been debating on purchasing a 3D scanner to make point cloud references of objects to model for games. For example, use the scanner to create a point cloud object of a character, then import ...
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1answer
8k views

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 ...
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2answers
5k views

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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2answers
1k views

How to find evenly spaced coordinates/point cloud of an object?

I'd like to convert a mesh object into a point cloud. I started using the vertices: ...
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1answer
399 views

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 ...
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2answers
5k views

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 ...
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1answer
475 views

Associate extra scalar data field with mesh or pointcloud

I work with scientific pointclouds and I often have extra columns of data in my .ply files. For example, I might have a column for "temperature" where there is a temperature value for each point or ...
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105 views

Color from imported OBJ not displayed in Blender [duplicate]

I want to import some .obj file that I have made with MeshLab. The point cloud file was actually in .pcd format and I used pcl_pcd2ply tools from PCL to change it into PLY-Format. Then I import it ...
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2answers
4k views

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 ...
7
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1answer
766 views

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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3answers
5k views

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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1answer
1k views

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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0answers
150 views

How to draw a colored point cloud from a .ply PCD file and render it? [duplicate]

To generate a point cloud i am using planes in blender, to compensate for unavailability of POINT data primitive. After reading the .ply point cloud file(PCD) the planes are added in the blender scene,...
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2answers
1k views

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. ...