https://www.posetteforever.com/viewtopic.php?f=68&t=3170&p=38768#p38768
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GrouchoCaesar
Monday, 03 March 2008, 07:38 AM

Re: Tracksuit Cloth Texture
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4: Now for the really sneaky part.  Using the "move layer coordinates" command, move the third layer ONE pixel up.  Because each layer is transparent apart from where there are spots, there should be an immediate drop-shadow effect going on.

Now save the original image (just in case), flatten the image and save as a grey-scale image somewhere you can find it.

This is your fuzz bump-map.  It works quite well because you are used to seeing most lighting come from above you.  By doing a drop-shadow effect in the bump-map, it enhances the psuedo-3d effect very... well, effectively.

I've provided a little AVI animation (Fuzz Test.zip) to show how effective the fuzz looks in moving light.

Some final comments:

First, the smaller the dots (ie the higher the resolution) the better the effect.

Second, if you are going to add an iron-on logo or other printing (say like an orange cat...) make sure to mask that off on the bump map so it looks flatter.

Lastly, I usually set the Bump parameter dial to 0.05 to begin with and experiment from there.

(Told you it was easy!)

GrouchoC

(Oh, and I'll upload a few MATs for Posy's Tshirt and pants with the texture... happy now?  :D )