POV-Ray : Newsgroups : povray.binaries.images : Ghurghusht: artifacts at dawn : Re: Ghurghusht: artifacts at dawn Server Time
31 Jul 2024 08:23:28 EDT (-0400)
  Re: Ghurghusht: artifacts at dawn  
From: Alain
Date: 14 Jun 2010 12:32:51
Message: <4c1659b3$1@news.povray.org>

> High!
>
> On 06/13/2010 04:42 PM, Alain wrote:
>
>> No. The problem is not the location nor the planet itself, BUT the
>> location AND the dimention of the planet.
>> You have very small distances with very large object. That's the
>> problem: the /range/ of the scales.
>>
>> One way that you could possibly work around would be, when you get close
>> enough to the geound that the planetary curvature becomes barely
>> perceptible, to switch to a limited, flat-world, version of the planet.
>> The part beyond the horizon can then be totaly droped, or replaced by a
>> large sphere located totaly under and out of view WHEN it can have an
>> effect on the scene. You may also be able to use a simple disk for that.
>> The function of that disk would only be to provide a shadow for the
>> media.
>
> So even converting a, let's say 1 by 1 degree slice of the isosurface
> into a mesh2 and than using only this comparatively small (900 by 900
> vertices) mesh2 instead of the whole isosurface won't help?
>
> See you in Khyberspace!
>
> Yadgar

It can help, if you also shift the scene toward the origin to restrict 
the effective range of values.

You can still use the isosurface, in a much smaller containing object.


Alain


Post a reply to this message

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