Am 23.12.2013 16:18, schrieb scott:
>> There are even people out there who, using nothing but a compass with a
>> sharp tip, cut patterns into acrylic glass to produce simple
>> stereographic images (point clouds actually).
>>
>> And yes, it appears to actually work.
>
> You can often see holograms in the paintwork of cars on a sunny day, it
> looks like an odd lens flare effect that is hovering some distance above
> the paintwork. It is caused by poor washing technique which drags grit
> across the paint creating tiny (but nothing like the wavelength of light
> tiny) grooves in the paint.

Yup, that's essentially the method they use for it - except that they do 
it on purpose :-P

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