gregjohn napsal(a):
> I was trying to make a mesh2 that looks like this: imagine a goldfish bowl with
> a conical funnel glued to it. The "circle" of the goldfish bowl is congruent
> with the large "circle" of the funnel, with the funnel poking back up inside it
> rather than being a "hat".
>
> I used a macro of my creation to extrude a mesh2 into this shape. A problem-- a
> feature-- of my mesh2 is that the normals all point away from the center line
> of the object. They are "correct" for the bowl portion but pointing the wrong
> way for
> the funnel portion.
>
> Odd thing is that when I render it, it looks like the opening of the goldfish
> bowl is closed off as if I had put a flat cylinder there.
>
> Now I know that it something might be unseeemly in a structure where the normals
> are messed up. But I wouldn't have expected my messing with the laws of nature
> to close off the shape. Have I interpreted what I'm seeing correctly?
>
>
>
>
>
1) look at the lathe object. It does exactly what you want.
2) as far as I know POVray does no backface culling unless you use
interior_texture. Are you sure there is no flat face where you expect
your mesh2 (e.g. water)?
3) please post your rendering in the pov-ray.binaries.images or post a
link to the image here. Also please post your pov-code.
4) also, don't forget you need a closed object if you want to use
refraction.
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