I don't know if this has been asked yet, but:
When I import obj files, Keyshot reads the mtl (material definition) file and correctly applies the texture maps, but none of the bump maps are applied. All of the maps are in the same folder as the obj and mtl files, so there shouldn't be an issue with missing textures.
For example, the lines in the mtl say:
"map_Bump pathblazer_tiresBum.jpg"
Should this line be re-written so Keyshot can apply the bump map?
Thanks
--John