clipka <ano### [at] anonymousorg> wrote:
> Jaro schrieb:
> > I'm new to pov-ray and I noticed strange thing about glass. It's full of grey
> > 1px dots, and I do not know why and how to remove this...
> > http://img37.imageshack.us/img37/994/error2l.png
> > Here is scene file: http://pokazywarka.pl/pov/ , just render 3 frames. On my pc
> > first looks ok, but it is without wooden table under glass, third one is grainy
> > only on sides of this piece of glass.
>
> Your glass surface is resting directly on the wooden table, at y=7.5;
> what you experience here is commonly referred to as "coincident surface
> problem": POV-Ray is not particularly good at dealing with surfaces of
> two objects just exactly touching each other, and gets the measles (sort
> of), because it just can't make up its mind which surface is "nearer" to
> the observer.
>
> Translate the glass plate by y*7.5001 instead of y*7.5, and you should
> be fine.

Thank you all very much :) I was not expecting "coincident surface problem" to
show on top and on sides of glass.
It's only a part of scene, I need to use merge, because I'm adding some elemets
there, and glass is transparent.

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