Questions tagged [point-clouds]
questions concerning the use of point clouds / data point sets in blender.
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Is it possible to chang geonodes Extrude Mesh for a face "Origin" to other position?
I'm using Blender 3.4.1. I'm learning geonodes. I wanted to use Geo Proximity to control Extrude Mesh on different faces. But I find that some face like "L shape" has the origin point in the ...
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Unable to add Compositor Point Density Node - 3D Point Cloud render
I am trying to create a 3D point cloud for a certain scene as part of a 3D vision project I am working on.
I am still learning how to use blender for this purpose, and after reading the documentation ...
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41
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Blender PLY export makes Vertex Colors darker
I wrote a Python script that exports Pointclouds (only vertices) and their vertex-colors (stored in color_attributes) to a .PLY file. The color on the exported .PLY file is way darker than the ...
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Cycles renders GeoNodes pointclouds as 3d spheres and sometimes as 2d disks; how can this be controlled?
When creating a Pointcloud through DistributePointsOnFace node the output is rendered by cycles on some occassions as actual 3d spheres and on others as 2d disks
; This happens altough the exact same ...
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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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2
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37
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Create new objects in a scene from point locations?
I'm using Geometry Nodes to generate a set of points within the volume of a mesh (a human character in this case), with the hope that I can take these points, export them into Unity, and use them as ...
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21
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Assign and show vertex color in edit or object mode for a point cloud
I have displayed a point cloud after writing the following code.
...
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35
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How to render point cloud into svg?
I recently created a point cloud in Blender and now I wanted to export/render it into svg. I tried it with a few Youtube tutorials and Adonis but none of them worked, because every time I render it, ...
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How to get point cloud produced by GN modifier by python?
I create a empty mesh and create many points in PointCloud and want to write a addon to export them, how to get them by python? i find the point cloud type doc, but don't get the api to get them:
...
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99
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How to generate Points (x,y,z) model from a 3D model using Blender
I am a newcomer to Blender.
Briefly, I want to generate Points (x,y,z) model from a 3D model using Blender. And use these points to do numerical simulation.
These points should be not only on the ...
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54
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Exporting PLY - No difference between moving object and moving its origin?
I create models in Blender, export them as point clouds and use them in another project.
Today I wanted to test the following use case and I am surprised that the exported ply file looks differently ...
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73
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How do I keep the Random Value node static on changing geometry? [closed]
I have an Alembic point cloud I'm trying to render as grains, but the random size keeps changing every frame because the point count isn't static. I guess I could use the seed input, but I have no ...
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22
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coordinates for object vertices/edges after transform
I'm trying to get the position of some edges connecting to a couple of vertices, that was transformed with the following:
...
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505
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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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53
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Point cloud visualizer convert to particles render issue
i need some help with Point cloud visualiser
To create a scene, i convert some .ply files into particles system so i can get cool results with light and traveling. I did convert 4 files, but one of ...
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121
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Point cloud visualizer
sorry for my english, i'm looking to render this point cloud scene, so i used point cloud visualizer and convert it into particles system. It works and i can create a scene with lights, volumetry...
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155
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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 ...
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33
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Blender rendering changing required data colour (red to magenta)
I am using Blender to create a 3D model of a location/building with data points demonstrating the data values through their colour. Red is negative, white is zero and, blue is positive. I imported the ...
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314
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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 ...
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127
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Getting colored point cloud sequence into Blender
I have motion capture data in the form of a colored point cloud that I would like to get into Blender. The export options from the MoCap program are:
I have been trying desperately to get the Alembic ...
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24
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Render Point Density to Texture
Was curious if anyone knows of a way to render out a point density to a 3dTexture for use in a game engine?
Usually these are just rendered to a red channel and then imported into a 3d texture in ...
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499
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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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Can I apply UV texture map into Geometry Node points?
I'm making a coral. It has UV map image texture and I spread it out some points with Geometry Node on the surface of the mesh, and I wanted to apply my UV texture to points.
For instance, yellow ...
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80
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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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117
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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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69
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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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263
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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 ...
- 101
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67
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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 ...
- 362
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454
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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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118
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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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96
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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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333
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How to turbulence the position of the point clouds in the geometry nodes? [closed]
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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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 ...
2
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374
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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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279
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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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573
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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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185
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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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609
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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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193
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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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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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2k
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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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2k
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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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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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378
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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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216
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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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1k
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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:
...
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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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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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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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265
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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 ...
