Well, a partial answer is that it is currently controlled by
engine:src/main/resources
assets.prefabs.player
player.prefab
"Mesh" : {
"mesh" : "engine:testmonkey",
"material" : "engine:monkeyHead1",
"hideFromOwner" : true
},
A real solution would involve allowing each player to choose their own mesh, and/or the mesh of other players connecting and setting the MeshComponent properties of each player individually as desired.
You could probably do this from a custom module.
Realistically, you might also have to set some other properties:
"BoxShape" : {
"extents" : [1.5, 1.6, 1.5]
},
and just these two in CharacterMovement
"CharacterMovement" : {
"height" : 1.6,
"radius" : 0.3,
},