> No, I did not throw myself before the occasional gigaliner (these fancy
> euro-standard juggernauts) roaring past my wohnklo... instead I
> commented out the whole collection of radiosity settings from the last
> weeks and added a #version 3.7 directive on top - and miraculously, not
> only the contrast returned,  but also the bluish tinge dwindled to an
> amount consistent with gray_threshold 0.75! Strange, strange, strange...

I wouldn't be too surprised if this had something to do with gamma. Rule 
of thumb #1 there: Let POV-Ray 3.7 take care of it.

> These computers in general and these raytracers especially are too
> difficult to understand for a simple mind like me... see below what I've
> got!

Well, apparently they're /not/ too difficult to understand - see what 
you can get with surprisingly little effort :-)

> Perhaps I could increase recursion_level to 4 or 5 to make it a
> little brighter...

I don't think it will make much of a difference (except that it will 
take longer to render).

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