(The answer to this may be in docs somewhere, but I can't find anything.)

I'm using pure radiosity to light a scene, because an area-light doesn't
look right (and learning quite a lot about radiosity in the process!).
However, I'm using Megapov 1.2.1 on a MacBook ('cos POV-Ray for Mac OS
doesn't work) and I get significantly different results compared to using
POV-Ray 3.6 for the same scene file. My understanding is that, unless you
activate the patches using the #version directive, Megapov should produce
the same output as the version of POV-Ray upon which it is based - 3.6.

If I have a large high-ambient object with no_image, no_reflection and
no_shadow, in Megapov it lights the scene nicely with radiosity. In POV-Ray
3.6, it provides no lighting at all unless I remove the no_image modifier
(inconveniently making the light source visible). Furthermore, optimal
radiosity parameters under 3.6 render differently, indeed poorly, under
Megapov (I have yet to find optimal parameters in the latter case!).

My question, therefore, is: are there differences between the radiosity
implementations, or could I be doing something else wrong?

This is playing havoc with my IRTC entry... :-

Any advice or pointers muchly anticipated!
Bill

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