> RTFM.

I couldn't find that in the documentation. Could you give me a link?


> Arrays exist while parsing, functions are evaluated while rendering.
> Functions are not macros!

Thanks.

> > Why can't I do:
> > #define f1 = function { f1(x,y,z) + g(x,y,z) }
> > ?
>
> This cannot work as it creates an infinite recursion!

Only if you assume functions are evaluated lazily, and don't unroll all
function references into a closed form. Apparently that's how POV works.

For all I knew, it could be the same as with scalar values:
#define f = function(x) { x }
//f(x) = x
#define f = function(x) { f(x) + 1 }
//f(x) = x+1

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