Palettes

Download Image To The Right (Grey box) For GreyScale Pallette which can be imported into either VoxEdit or MagicaVoxel (or numerous other) or see below for details on how to do yourself.

MagicaVoxel <-> VoxEdit

Warning Back Up What You're Doing First, this will change whatever you are working on!

Open MagicaVoxel

Select palette 2 (see first image)

Save: "greyscale.png"

VoxEdit, Select Element, Palette, Load Palette, select greyscale.png". You now have an entirely greyscale palette. (see second image)

The exact same can be done in reverse to import this into MagicaVoxel.

W3Schools Link Colors HEX (w3schools.com)