Hi Philip, 
I use different workflows. When using simple materials i export straight from Moi to Keyshot using the .obj format as Michael already mentioned. 
Materials used in Moi are transferred as well...great stuff. 
When i need uvmapping i use the .obj OR .lwo format and import in Modo/Lightwave, do my stuff, export to .obj and import in Keyshot. 
 
Edwin
 
As a final touch, God created the Dutch  |