POV-Ray : Newsgroups : povray.binaries.images : Volume fraction of noise3d vs threshold vs. mega version 39kbbu) : Re: Volume fraction of noise3d vs threshold vs. mega version 39kbbu) Server Time
2 Oct 2024 08:19:28 EDT (-0400)
  Re: Volume fraction of noise3d vs threshold vs. mega version 39kbbu)  
From: Nathan Kopp
Date: 18 May 2000 17:05:06
Message: <39245b02$1@news.povray.org>
Greg M. Johnson <gre### [at] my-dejanewscom> wrote...
> I used metallographic techniques to determine the volume fraction of
> space which is filled by the surface.  The nonzero volume fraction at a
> threshold of zero explains the plateaus we saw in the Mega 0.0-0.4
> noise3d function.
>
> I ran the same file in both Mega 0.4 and Mega 0.5.
>
> Note that simply switching the version statement in Mega 0.5 did not
> give me the old noise3d function. Thus, the "original" noise3d is lost
> in version 0.5.

That is odd.

This is very interesting info, although I think that your graphs might be
mis-labeled (maybe the red line should be 0.4 and the black line 0.5).

-Nathan


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.