Questions tagged [point-clouds]

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

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33 views

Dark horizon line between ocean and bottom of HDRi sky

I want to create a simple animation using the camera to fly through clouds (cloud panes, in this case) over a simple ocean. I've never used Blender to create an atmospheric scene before, so I'm ...
4
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1answer
137 views

Accessing "n+1"th point instance in geometry node

Using Blender beta 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 ...
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29 views

Pointclouds from rendered depth images do not align

I am trying to render multiple RGB-D images of a given object in Blender 2.93 using the python interface. The scene contains a single object at position [0, 0, 0] and I am rotating a camera around it ...
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91 views

How do I "voxelize" an OBJ mesh that was created in a voxel editor?

I've been trying to find the right workflow to solve my problem for over a month now. Any tip/insight would be greatly appreciated. Scenario: I create a voxel mesh in MagicaVoxel and then, instead of ...
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0answers
17 views

How to render a 360 image from a point cloud? [duplicate]

I like to render a 360 image (say equirectangular) from a point cloud. See the link below for the format of 360 images I hope to obtain: https://www.dtmsoftware.com/360-degree-images I have followed ...
2
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1answer
856 views

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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0answers
160 views

Import .ply with vertex colors into Blender

I'm trying to render something that would look like this: I've had a similar problem here: Blender 2.81 doesn't seem to be importing vertex color for .ply And in that question I linked where ...
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470 views

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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1answer
839 views

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 ...
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0answers
74 views

Emit particles from point cloud object for each frame of animation

I'm working on a project that is intended to simulate the motions of stars in a galaxy by importing snapshot txt files with thousands of xyz coordinates each - but for the purposes of this question, I'...
3
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1answer
62 views

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, ...
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0answers
101 views

Blender Point Cloud access

Is there possibility how to access to the points in Point Cloud object in Python API Bleder > 2.92? I want to change position of each point, set color and set scale. I tried the code below. This ...
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0answers
649 views

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: ...
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0answers
122 views

Exporting maya animation to blender

I made an animation in MotionBuilder with an actor driving a character's animation and then exported that to Maya. Then I clicked creat->sets (didn't click the box) and then cache->alembic cache-...
10
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1answer
3k views

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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0answers
24 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 ...
0
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1answer
492 views

How to load ".npy" file into Blender?

I have a 3-dimensional volume array of size (64, 64, 64) which has an extension of ".npy". I wanted to visualize in Blender so that I can do post-processing work from the software. I tried ...
0
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1answer
64 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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0answers
49 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 ...
0
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1answer
65 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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0answers
131 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 ...
2
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1answer
2k 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
426 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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0answers
32 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'. ...
0
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1answer
51 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 ...
0
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1answer
50 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: ...
1
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1answer
884 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
714 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. ...
0
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1answer
458 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: ...
6
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2answers
211 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 ...
4
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1answer
882 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
997 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 ...
10
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1answer
1k 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 ...
2
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0answers
115 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
999 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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0answers
175 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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0answers
1k 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 ...
1
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1answer
394 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.
0
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2answers
2k 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, ...
3
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1answer
371 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, ...
2
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1answer
1k 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
7
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3answers
2k 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 ...
6
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1answer
901 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
2k 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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0answers
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 ...
0
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1answer
1k 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 ...
3
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2answers
896 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. <...
3
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1answer
931 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
2k 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 ...
3
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1answer
11k 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 ...