I'm glad I came to this thread as well.  I've been struggling in vain to learn how to do proper bump maps -- to no avail.  I'd love to learn how to do procedual bump maps too.  Potential Bookmark.

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Asus N50-600 - Intel Core i5-8400 CPU @ 2.80GHz · Windows 10 Home/11 upgrade 64-bit · 16GB DDR4 RAM · 1TB SSD and 1TB HDD; Graphics: NVIDIA Geforce GTX 1060 - 6GB GDDR5 VRAM; Software: Poser Pro 11x