Le 2020-02-29 à 15:07, GioSeregni a écrit :
> Hi to all, thank for the add  to this group and excuse me for mybad english.
> I am new in this forum, but I am a old user of POV-Ray (I remember the old dkb
> ....). 30 years ago (!) I starting my first parser, in lisp, from the AutoCAD
> ambient (from the data base, at run time, no dxf needed...)
> Now, for memory lack reasons, I have encountered an unpleasant problem. I am
> unable to find the incomplete BMP/TGA file when when pov stops, for various
> reasons.
> I understand that the new Radiosity (excellent) does not allow the quite
> prosecution of the job, but the question is different. The partial bmp was
> useful for various reasons (use of the part, crash analysis ...).
> Now I ask, is this option still possible? And if it is not possible, what is the
> structure of the "state" file?
> I would have no problem capturing the data, but knowing the structure it would
> take less time to develop the tool.
> Many thanks in advance and regards!
> G.S.
> 
> 
> 

Since the alpha of version 3.7, the image file is not generated until 
the render have finished. The data needed are saved in the *.povstat 
file allowing the continuation of an interrupted render.
Radiosity is not that new as it was introduced with version 3.0.
In the povstate file, the value of each pixel is represented as 3 single 
precision float number similar to that of an EXR file. This is, to my 
knowledge, only a superficial similarity. Also, those data are often not 
in a sequential order and the file may be sparse.

The new mechanism allow rendering with all the available cores of modern 
computers and seamless continuation of interrupted radiosity scenes.

Alain

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