Am 21.10.2020 um 08:35 schrieb Thomas de Groot:
> Good work sir. I like the mood (Sunrise indeed, as Alain already wrote; 
> It is mainly a question of environmental temperature differences at 
> start or end of day, I guess)
> 
> I very often use a grey wall behind the camera, in addition to 
> radiosity, especially for these kind of scenes. An old photographer's 
> trick?
> 
> The media on/off is something I have also been struggling with. It very 
> much depends on the kind of output one wants to achieve (in addition to 
> the quite different render time). I generally prefer the 'off' state.
> 

Hi Thomas,

many thanks for your compliment. I'm not an experienced photographer but 
I remember that professional photographers use white canvasses to 
reflect the light of the sun or their flashlights especially in studio 
ligthing behind or beside the camera. May be I invented the wheel again 
here.

To switch media on or off in radiosity scenes depends on the scene and 
the media used IMO. Having emitting media in a dark room one will like 
to switch it on to illuminate the darker areas of the scene by the 
media, e.g. a candle. Scattering media in bright light produce to much 
reflections and the feature is better turned off. I think one cannot 
give a generall guideline here. May be one can consider in a future 
version of POV to implement a continous approach instead of the on/off 
we have actually.

Best regards
Michael

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