It is possible to have different textures on the same UV of a component! And you can move, scale, rotate these textures independently on each component/instance.
Just use Octane render. TIG helped in the development of exporting plugin and here is my topic on Octane forum how to use instancing and Sketchup.
http://render.otoy.com/forum/viewtopic.php?f=31%26amp;t=22581
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