POV-Ray : Newsgroups : povray.general : SEVERE shadow problems with Blender POV renders?? Is anyone familiar with i= : Re: SEVERE shadow problems with Blender POV renders?? Is anyone familiar wi= Server Time
29 Apr 2024 03:44:27 EDT (-0400)
  Re: SEVERE shadow problems with Blender POV renders?? Is anyone familiar wi=  
From: tmelram
Date: 19 Nov 2019 17:35:01
Message: <web.5dd46d0af0a1c145c8bf72b50@news.povray.org>
"jr" <cre### [at] gmailcom> wrote:
> hi,
>
> "tmelram" <taj### [at] yahoocom> wrote:
> > "jr" <cre### [at] gmailcom> wrote:
> > > "tmelram" <taj### [at] yahoocom> wrote:
> > > > "jr" <cre### [at] gmailcom> wrote:
> > > > > "tmelram" <taj### [at] yahoocom> wrote:
> > > > > > Hi, I am using Blender to model and wanted to use POV ray to render my
scenes.
> > > > > > But, I'm getting serious shadow issues. There seem to be triangles near
wherever
> > > > > > there are shadows!
> > > > > >
> > > > > > A picture of the problem:
> > > > > > https://i.imgur.com/z6Ftxv6.png
> > > > > >
> > > > > > How can I remedy this??
> > > > >
> > > > > I guess it would be helpful to see the (generated) scene code.
> > > > >
> > > > >
> > > > > regards, jr.
> > > >
> > > > Sure, here you go:
> > > > ...
> > >
> > > not sure of the cause, but changing the light_source makes for a smooth shadow
> > > line, ie I did:
> > > ...
> >
> > Thanks, it worked!. But, it seems to have flipped the direction of the light.
>
> yes.  I left out the transform.
>
> > It's either upside-down,backwards, or both. I chose a simple sphere with one
> > light just to test. But for a more complex scene it might help to know what
> > exactly did you change to make it so that there wouldn't be any triangles. What
> > did you do?
>
> nothing else.
>
> as Mr and B Pokorny have mentioned, perhaps use a "real" sphere, or, if there's
> a need for the mesh2, try using 'smooth triangles' (see documentation on 'mesh2'
> object).
>
> sorry to be of little help, I do not use Blender.
>
> > Also I found this article:
> > http://wiki.povray.org/content/Knowledgebase:The_Shadow_Line_Artifact
> >
> > What do you think of it and the solutions?
>
> depending on the scene you're working on, I think playing with 'shadowless' in
> the lights, and or with 'no_shadow' object modifier, is definitely worth trying.
>
>
> regards, jr.

You left out the transform? Do you mind posting the code for that?


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