emkaah wrote:

> I'm working on a macro, and I get the idea that:
> 
> #declare SphereA = sphere{<0,0,0>,5 pigment{Green}}
> 
> #declare Count = 0;
> union{
>  #while (Count<5)
>   object{SphereA translate x*2*Count}
>   #declare Count = Count + 1;
>  #end
> }
> 
> uses a lot more memory then:
> 
> union{
>  sphere{<0,0,0>,5 pigment{Green} translate x*2}
>  sphere{<0,0,0>,5 pigment{Green} translate x*4}
>  sphere{<0,0,0>,5 pigment{Green} translate x*6}
>  sphere{<0,0,0>,5 pigment{Green} translate x*8}
>  sphere{<0,0,0>,5 pigment{Green} translate x*10}
> }
> 
> Can somebody tell me this is true? I find this strange for some reason.

The spheres in the union all use the same texture.  The separately-
declared spheres all use separate textures (since you gave them
separate ones).

So, if you're going to texture a bunch of things the same way, see if
they can go into a union together, and give the union the texture.  This
works very well if the texture is not patterened.

Regards,
John

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