Broken rendering with flat surface and scatter3d traces

[slishak]

https://codepen.io/anon/pen/KrXrgJ

In the above codepen, the 3D axis appears to have been corrupted. This only appears to occur when there are both a surface and scatter3d, all the z coordinates are identical, and the z coordinate can not be expressed as 2^n where n is an integer.

With z = Math.pow(2, -1):

With z = Math.pow(2, -1) + 0.1:

[etpinard]

Thanks for the report.

[archmoj]

This demo illustrates a similar issue when having a mesh3d with a surface. So it is not related to scatter3d and the bug is likely on the surface3d side.