Hi everybody,

since everybody knows how to render a reflective sphere on a checkered 
floor, I wonder how to make a checkered sphere. Since map_type 1 only 
works only with pigment or texture maps, how do I map the checkered
pattern correctly onto a sphere?

Maybe someone could be so kind and explain it?

GreetZ
Matthias

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> Hi everybody,
> 
> since everybody knows how to render a reflective sphere on a checkered 
> floor, I wonder how to make a checkered sphere. Since map_type 1 only 
> works only with pigment or texture maps, how do I map the checkered
> pattern correctly onto a sphere?
> 
> Maybe someone could be so kind and explain it?
> 
> GreetZ
> Matthias
You have to decide what is 'correct'  You mean like latitude nad longitude?

Try this in the docs:
3.5.12.6.5  Mapping using warps

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> since everybody knows how to render a reflective sphere on a checkered 
> floor, I wonder how to make a checkered sphere. Since map_type 1 only 
> works only with pigment or texture maps, how do I map the checkered
> pattern correctly onto a sphere?
>
> Maybe someone could be so kind and explain it?

It's not perfect at the poles, but this is the basic way of doing it.

sphere {0,1 pigment{uv_mapping checker White Blue scale 0.05}}

Not every object type supports uv_mapping, but it's handy when they do.

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