I would like to postulate this problem; how to extract the direction of wood grain from a texture?
The 'swirlz' filter can create contours from gradients, but I want to know if a filter exists that can do the reverse... generate a gradient type angle map based on the direction of contours (the wood grain)
My lame workaround is to create a bump map of grooves from the wood-grain and reflect a 'circular angle map gradient sky', its tricky to dial-in the bump height and lacks resolution..... its so lame that its better to fake the effect with fairly random wavy angle map.
But I really want to make a perfect wood mxm...
and to be able to make angle maps in general.