Consider 10 random points as

pts =  RandomReal[{-1, 1}, {10, 3}];

The edges of the polyhedron formed by these points can be visualized as

HighlightMesh[DelaunayMesh[RandomReal[{-1, 1}, {10, 3}]], 
 Style[2, Opacity[0.]]]

However, The edges are thin. I want to change the thickness of the edges and the colors as well.

Edit 1

In my approach and the answer provided by @Szabolcs, all the edges along with some inner planes are visible while I need only the outer edges and no surface or plane.

How can I do this?

Edit 2

I got it.

  ConvexHullMesh[pts], {Style[1, {Black}], 
   Style[2, Opacity[0.]]}]]

1 Answer 1


For some reason, these options don't work directly in DelaunayMesh in 3D (they do for 2D meshes), but they do work in a MeshRegion applied afterwards.

m = DelaunayMesh[RandomReal[{-1, 1}, {10, 3}]]

 MeshCellStyle -> {2 -> None, 
   1 -> Directive[AbsoluteThickness[3], Red]}]

enter image description here

  • $\begingroup$ I don't mind how it is done. I am happy with the result. Thanks. $\endgroup$
    – user36426
    Aug 22, 2018 at 14:23
  • $\begingroup$ However, I have found two problems with this solution. Firstly, it shows all the edges (which was there in my approach as well) while I need only the outer edges and not the diagonals. Secondly, I find that some of the surfaces formed by these points are still not transparent. $\endgroup$
    – user36426
    Aug 22, 2018 at 14:40
  • $\begingroup$ @Majis What are "diagonals"? $\endgroup$
    – Szabolcs
    Aug 22, 2018 at 14:49
  • $\begingroup$ @Majis Regarding inner edges, that was not in your question. If I understand what you are sayig then you want the ConvexHullMesh, not the DelaunayMesh. $\endgroup$
    – Szabolcs
    Aug 22, 2018 at 14:50
  • $\begingroup$ The diagonals are the edges which do not lie on the surface of the convex hull formed by these points. $\endgroup$
    – user36426
    Aug 22, 2018 at 14:51

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