Maybe software like Substance Painter/Designer or 3DCoat are ideal for you to create materials.

Check for example chipp's workflow with MoI, 3DCoat and Keyshot:

http://moi3d.com/forum/index.php?webtag=MOI

or have a look at Substance Painter/Keyshot workflow (simply google for it):

https://support.allegorithmic.com/documentation/display/SPDOC/Keyshot

Regards
Stefan