# \#vtkglyph3dmapper

**URL:** https://discourse.vtk.org/tag/vtkglyph3dmapper/33.md

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## [How can I efficiently render 1 billion cubes in VTK.js?](https://discourse.vtk.org/t/how-can-i-efficiently-render-1-billion-cubes-in-vtk-js/15724)

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**Author:** [@Amit\_Bhakar](https://discourse.vtk.org/u/Amit_Bhakar)\
**Replies:** 4\
**Last updated:** [June 24, 2025, 9:11am UTC](https://discourse.vtk.org/t/how-can-i-efficiently-render-1-billion-cubes-in-vtk-js/15724 "2025-06-24T09:11:52Z")

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Hi all, I’m working on a web-based 3D visualization using VTK.js, and I need to render a very large number of cubes — on the order of 1 billion. I’m looking for suggestions or best practices on how to handle this effici…

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## [How to color vectors by vector magnitude using vtkGlyph3DMapper?](https://discourse.vtk.org/t/how-to-color-vectors-by-vector-magnitude-using-vtkglyph3dmapper/15097)

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**Author:** [@scotsman60](https://discourse.vtk.org/u/scotsman60)\
**Replies:** 7\
**Last updated:** [January 8, 2025, 8:53pm UTC](https://discourse.vtk.org/t/how-to-color-vectors-by-vector-magnitude-using-vtkglyph3dmapper/15097 "2025-01-08T20:53:32Z")

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Hello!!! I’m using VTK 9.2.6 and Python 3.11.6 I’m trying to display (orient, scale and color) arrows using a vector field and using the vtkGlyph3DMapper (instead of vktGlyph3D). I have the orientation and scaling wor…