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Thread: Cockpit Canopy Swirlies

  1. #31
    it's a manhole cover ↓ JoePoe's Avatar
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    Fingerprints and micro-scratches


    I'm just having some fun with a rainbow and wood pattern.
    .... just a little something I like to call.... a "swurlee".

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    Last edited by JoePoe; 02-03-2015 at 04:52 PM.
    System Specs: A pile of sand, a couple of wires, a real live mouse and a beer.

  2. #32
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    Quote Originally Posted by spherical View Post
    Backscattering doesn't exactly translate to "swirlies". Overnight, I was thinking that he might be meaning the circular micro-scratches that inevitably appear on the polycarbonate until they're polished out. Those would add to what actually would be forward scattering.
    Quote Originally Posted by shrox View Post
    I was thinking smudges and smeared fingerprints. Tiny scratches from polishing sound more like it too.
    It could also be the natural polarization that polycarbonate and other plastics acquire during manufacturing interacting with a polarized light source. The long polymer chains in the plastic are bundled with more or less consistency, producing a polarizing material. With a polarized light source, and two layers of polarizing material (i.e. looking through it from the side), you might get an interference pattern similar to those described here:


    I'm sure cockpit windscreens are manufactured to very high quality requirements, perhaps even including the alignment of the polymer chains, but there still might be a type of moire pattern as a result. Just a thought.

    mTp

  3. #33
    Lightwave rebel Pensart's Avatar
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    Nice result JP
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    Joined the Rebellion

  4. #34
    Super Member spherical's Avatar
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    Quote Originally Posted by MonroePoteet View Post
    It could also be the natural polarization that polycarbonate and other plastics acquire during manufacturing interacting with a polarized light source. The long polymer chains in the plastic are bundled with more or less consistency, producing a polarizing material.
    Yes. That's what I indicated earlier and showed in the shot of the F-16.
    Blown Glass · Carbon Fiber + Imagination

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  5. #35
    it's a manhole cover ↓ JoePoe's Avatar
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    Quote Originally Posted by Pensart View Post
    Nice result JP

    Thanks

    one more....

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    System Specs: A pile of sand, a couple of wires, a real live mouse and a beer.

  6. #36
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    Something I built in my free time:
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    Feel free to use the normal map wherever you want. You need db&w tools to load the surface.

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