When examining the source code of
THREE.SceneUtils.createMultiMaterialObject
, you will notice that it achieves the multi-material effect by generating child meshes within a parent object.
To alter the colors of the materials, use the following method:
var object = THREE.SceneUtils.createMultiMaterialObject( geometry, materials );
...
object.children[ 0 ].material.color.set( 0xff0000 );
object.children[ 1 ].material.color.set( 0x00ff00 );
Refer to the source code or documentation of THREE.Color
for valid color formats.
Version: three.js r.77