POV-Ray : Newsgroups : povray.bugreports : artifacts on lathe object : Re: artifacts on lathe object Server Time
7 Dec 2021 12:31:26 EST (-0500)
  Re: artifacts on lathe object  
From: omniverse
Date: 10 Oct 2017 16:10:00
Message: <web.59dd28f7d40b44f29c5d6c810@news.povray.org>
"David Mandelberg" <dav### [at] mandelbergorg> wrote:
> "Bald Eagle" <cre### [at] netscapenet> wrote:
> > "David Mandelberg" <dav### [at] mandelbergorg> wrote:
> > > When I render the below scene, there are some spurious black artifacts near the
> > > center of the red vuvuzela. Without the translation and rotation, the artifacts
> > > go away. I'm using POV-Ray 3.7.0 on Ubuntu 16.04.
> > >
> >
> > I think there may have been some issues with the bezier spline, that have been
> > addressed post-v-3.7
> > I didn't have a chance to render this in 3.7.1-beta.8, but I'd guess it might
> > look better.
> > I'd say either install the beta and try it, or use a different spline type.
> There's still an issue in 3.7.1-beta.9. I'll try 3.8.0-alpha.9322209 next, but
> it'll take me a bit of time to get to that.

Think you'll find it's the same... except be aware v3.8 has changed default
ambient so if you render with directive #version 3.7; it will look different
from using 3.8 in its place.

At first I thought the lathe object was thinner but its just the missing ambient
in shadow.

Nothing new about lathe problems, there was something about negative control
points for bezier_spline which I'm guessing doesn't actually relate to this

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