> As the mosaic preview is a _preview_ feature it doesn't really make sense
> when used with radiosity.

I disagree.

  1: I may need radiosity in a preview, e.g. when I want to test wether
     radiosity suffices to shed enough light on some part of a scene.
  2: I may not mind the 33% overhead, e.g. when I render somebody
     else's scene and I want to know quickly what it is and only
     eventually obtain the final image.
  3: The doc (5.2.2.2.4) reads:
       Future versions of POV-Ray will include some system
       of temporary files or buffers which will eliminatethese
       inefficiencies and limitations.
     As soon as that is established, mosaic preview will be as quick as
     line-by-line preview, but more informative. At that time everybody
     will mix radiosity and mosaic, so why disallow now?

Mark Weyer

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