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Questions tagged [point-clouds]

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

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5 votes
2 answers
6k 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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  • 637
5 votes
2 answers
14k views

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 ...
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  • 591
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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  • 691
5 votes
2 answers
2k 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. ...
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6 votes
1 answer
933 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 ...
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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
1 answer
469 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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5 votes
1 answer
425 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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  • 210
7 votes
2 answers
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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6 votes
1 answer
1k views

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 ....
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  • 185
8 votes
2 answers
6k 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 ...
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  • 81
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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0 votes
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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3 votes
1 answer
14k views

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 ...
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1 vote
1 answer
320 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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  • 167
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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  • 31
1 vote
0 answers
69 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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