The picture above was made with this POV file. The texture was formed in part by the bump map shown below.
The bump map was made with this POV file.
The shading comes from the bump map pictured above. In adition, looking at the fabric you will see apparent vertical and horizontal streaks. One bozo pattern was stretched out horizontally, and another vertically. These two patterns were then used as pigments in the checker pattern, such that the horizontal streaks appear on horizontal bumps, and the vertical streaks appear on the vertical bumps. Even under close examination, this creates a strung impression of horizontal and vertical threads woven together.
The checker pattern puts one checker square on each unit square. To match this to the bump map, it has to be scaled in half, so that we have two-by-two checker squares in each unit square, just like the bump map. Additionally it will need to be scaled by whatever amount the bump map has been scaled by (0.17 in my example).
As you can see, it looks a bit odd from oblique angles. This is a problem with any bump map. If you really need that much detail in your fabric, you should probably model the individual threads.
WARNING: This POV object is based on a real object. I'm not aware of any legal issues related to the design of that real object. It is the user's responsibility to cover your ass.
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