"omniverse" <omn### [at] charternet> wrote:
> "Norbert Kern" <nor### [at] t-onlinede> wrote:
> > Hello,
> >
> > here is my attempt, using a layered texture and an imagefile for the scratches

.....

> > Norbert

Holy crap.  :O



> I like that, fine scratches or scuffed. Great how it follows the curvatures and
> reflected light.


I think that's an important part of the effect - the halo of concentric
scratches.


> Any criticism I can think of would be that some lines appear to radiate outward
> from the lit areas, showing up as bright as the other, non-radial lines. Which
> is what was mentioned before about the original idea, so I wonder how that
> directional condition could be achieved? Seems like a polarization effect needed
> to do that anyhow.



Yeah - I'm also still very curious as to what gives rise to that selective
effect IRL.  I'd be tempted to predict that only a series of oriented lines
would reflect strongly - not a circular pattern.  I mean, it's not like
completely random scratches adopt a circular pattern - so it must necessarily be
a purely optical effect.

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