On 2 Jan 2010 13:47:35 -0500
Warp <war### [at] tagpovrayorg> wrote:

> > 1) They only seem to appear in lath objects,
> 
>   Lathes have shown artifacts (which look similar to coincident surface
> artifacts) at the "seams" probably for as long as they have existed. I
> don't know if it's a bug or a limitation.

Hi Warp.

'Seams'? Do you mean at one of the nodes defined for the spline? The
artifacts do not coincide with the nodes. The nearest node is at the
widest part of the cup - quite far away.

I've now noticed that in a 800x600 image, the problem is on line 299, and,
in a 1200x900, the problem is on line 449 - exactly the (vertical) center
of the image.

>   Either move the camera up or down a tiny bit, or if that doesn't help,
> use a triangle mesh instead of a lathe (it will render faster too).
> There's a unitility for that in the object collection.

Thanks for the hint. I have my glass definition as Bezier splines, and
the utility seems to accept linear, cuadratic and cubic/natural splines.
Is there some easy way to convert too?

Cheers,
John

Post a reply to this message