Wasn't it Chris Huff who wrote:
>In article <39EF7EAE.93AD3385@peak.edu.ee>, Margus Ramst 
><mar### [at] peakeduee> wrote:
>
>> Yes. Although I believe a few features, e.g. radiosity, are not fully
>> backwards-compatible.
>
>Radiosity will require completely different settings, anything which 
>uses noise(bozo, wrinkles, agate, and many other patterns, things like 
>turbulence and iridescence) will look slightly different...I think 
>that's it.
>

There are a few extra reserved words. I found that a lot of my old POV-
Ray scenes needed to be modified because they used "r" as a variable.

The new faster #macro implementation won't handle nested #macros,
whereas POV-Ray does handle them. I.e. you must #end one #macro before
you start defining the next one.

-- 
Mike Williams
Gentleman of Leisure

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