I post here some samples which explain the principles of bump maps on beveled lines. I use only lines with outer bevels in these cases because otherwise the line itself may cause problems in superpositions.
Of course, Ross' your technique with inner bevels has its own advantages which are different from the present ones!
Note that in previous images I also superposed different bevel profiles.
I am sure this relatively classical bump map technique could give many other effects and I hope you will enjoy it! (and also I apologise for a so long delay!)
ivan
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