Pointcloud 3D render

General TouchDesigner Discussion
1

I have a question for the rendering the point cloud file look 3d.

mostly I capture the 3d with ridar to td with add sop - convert sop to geo comp,

but for this time, I want to make it look more 3d like visuals

2025-01-06-12-01-56
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It seems Richard Burns works, @Ennui, and while I tried, I have several questions.

for now, I am working on a 1500 * 1500 pixels point cloud file. When I put in to geo

With a box of spheres, It is so buggy.

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for now, I want to put a sphere shape, but I think I will reduce the point of sop for better performance.

The box is 22 points, and the frequency of one polygon sphere is 11 points, but the shape is not a perfect circle. (It works fine but huge frame drops, I want to have more headroom for moving the geo in realtime :))

  1. does it have any method to get a sphere with low points?
  2. Or does it have any tips for getting a better performance? Or suggestion? It would be welcome!
2

Hi @gyuchulm,

in how much detail you can go depends a lot on your hardware and rendering a 2.2 million points cloud with spheres is definitely putting stress on most hardware.

You can try making use of the Line MAT which also has a Box and Sphere rendering option under the “Point” parameter page, just make sure to turn off “Draw Lines” on the “Line” parameter page before using it.

Alternatively see if you can get good results with using Circle’s or Circle Sprites.
Additionally you might find it to be ok to only render some points as spheres while rendering most points as Circle Sprites.

cheers
Markus

3

This is what I achieved with a lot of optimization:
5,200,000 points; stable 30 fps on a laptop with an 11th Gen i7 processor and a 3080 GPU, simultaneously handling three other light patches for the show.
Rendering is instanced on SOP circles with 5 sides and real time pointing at the camera.
Scroll the text for english version.

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