POV-Ray : Newsgroups : povray.binaries.animations : Re: How to fix texture to moving part : Re: How to fix texture to moving part Server Time: 23 Jul 2019 11:40:09 GMT
  Re: How to fix texture to moving part  
From: MichaelJF
Date: 8 Oct 2013 15:50:00
Thomas de Groot <tho### [at] degrootorg> wrote:
> On 8-10-2013 12:53, Janc wrote:
> > You can see how Rust texture change when tilt.
>
> Do you use crand in your texture? If so, don't!
>
> Quote from Documentation:
> Note: The crand should not be used when rendering animations. This is
> the one of a few truly random features in POV-Ray and will produce an
> annoying flicker of flying pixels on any textures animated with a crand
> value. For these reasons it is not a very accurate way to model the
> rough surface effect.
>
> Thomas

Hi Thomas,

no, there is no crand in the texture. Janc had forgotten to post the link to the
other discussion here:

http://news.povray.org/povray.animations/thread/%3Cweb.52531de35b3e3e64ef0c5fed0%40news.povray.org%3E/

Janc's observations are right completely. But the texture /* is */ rotated, what
we see here is another phenomenon. It's more a matter of scale and the pixel
level. I will create a little animation with Janc's texture to illustrate this
issue within the next hours.

Best regards,
Michael


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