Questions tagged [point-clouds]

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

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How to import reference images to specific XYZ positions

Dears, Scientific question: I have a bunch of images taken from a microscope. All images have XYZ coordinates of their real world position. How can I import them into Blender via a script to have them ...
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31 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 ...
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Point instance and Curve line

I'm doing a tutorial of a leaf on youtube. I need Point instance and Curve line but in 3.0 and more versions there's the point instance and in the previous there is Curve line. Which version of ...
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22 views

Render Coloured Point Clouds as Collection of Spheres

I have a coloured point cloud in a .pcd file, that I can easily convert to a .ply file using Open3D. I would like to visualise ...
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Turn instances into bounding boxes or proxies in the viewport

I am currently doing a large scale scene involving scattering tons of trees. The viewport slows to a crawl then I do so, is their a way to convert the meshes into bounding boxes when in the viewport ...
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PLY file not showing colors (the ply form has no edges or faces, just vertex [pointcloud])

I wanted to retexture a model that I made using 3d scanners, the model has no faces or edges, just vertex. The model itself is not showing the vertices colors, and I later on realized I had no way to ...
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1 vote
1 answer
36 views

Can a Point Cloud be Spread Through a Smoke Sim?

I'm simulating a sand storm and need a large number of particles in my smoke simulation. After reading about point clouds in Blender 3.0+ and using a few examples I was wondering whether they could be ...
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30 views

Dense Cloud col attribute not showing

I'm using metashape agisoft to generate dense cloud from images and I exported the points in PLY and imported to blender. then used attribute named it col to get the original color what calculated by ...
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116 views

How to turbulence the position of the point clouds in the geometry nodes?

I wanted to make an animation of the appearance from chaos, but my knowledge is not enough. My geonodes: Еxpected result: Until I found the answer and do it through the Erindale Toolkit,the result ...
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2 votes
1 answer
152 views

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 ...
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2 votes
1 answer
93 views

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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How to export a point cloud data generate inside blender? [duplicate]

I am trying to export these spatial coordinates and other information of this point cloud generated in Blender from a 3D model, to a readable text file. I have tried the .obj format available for ...
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Misalignment of depth map when projecting two views into 3D point cloud

Similar to this question, I'm projecting two views (RGBD) back to 3D point cloud, but observed severe misalignment. The two views are generated using the same blender script. The blender file is here. ...
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1 vote
1 answer
313 views

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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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 ...
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5 votes
1 answer
424 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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68 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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352 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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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 ...
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7 votes
1 answer
5k 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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648 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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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 ...
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2 votes
1 answer
2k 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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93 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'...
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3 votes
1 answer
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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, ...
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139 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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928 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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10 votes
1 answer
4k 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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1 vote
0 answers
26 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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711 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 ...
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111 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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0 answers
62 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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1 answer
76 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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1 vote
0 answers
176 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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2 votes
1 answer
3k 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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1 vote
1 answer
592 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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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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1 answer
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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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1 answer
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: ...
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1 vote
1 answer
1k 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 ...
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2 votes
1 answer
897 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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0 votes
1 answer
542 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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6 votes
2 answers
236 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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4 votes
0 answers
1k 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 ...
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2 votes
1 answer
1k 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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10 votes
1 answer
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 ...
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2 votes
0 answers
126 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 ...
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19 votes
1 answer
1k 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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200 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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1 vote
0 answers
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 ...
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