Oh, yes, I have to reduce the portion of the image to 960x1800, like the
main image. Is it?



news:41698912@news.povray.org...

> 41695904$1@news.povray.org...
> >> I rendered the image like this +w6400 +h4800 +SR0.44 +ER0.64 +SC0.55
> >> +EC0.75 and in BMP format is very big, it's 87'9 Mb. Is it normal?
> >
> > 6400 x 4800 pixels (30 Mpix image)  x  3 bytes (24 bit image)  =
92160000
> > bytes
> > which corresponds to the 87.9 MB you have (the BMP header adds a few
more
> > bytes).
> >
> > I'd suggest you save your images using a lossless compression format
> > such as PNG or TIFF.  Just use the POV-Ray +FN flag (for PNG) while
> > rendering,
> > or convert the BMP to e.g. PNG using your favorite image editor.
>
> Note that I personally favour BMP for output. The main reason is that
images
> of this size take ages to save in PNG in the image editing program I'm
using
> (and in the other I tested), so working on large PNG files can be really
> painful. Saving and loading BMPs is extremely fast in comparison.
>
> Also, while partial BMP files seem to be fool-proof, partial PNG files can
> be a problem (my editor don't open them for instance), so I don't think
it's
> advisable to use PNG as an output format in this case (converting the BMP
to
> PNG after the render is advisable). Of course, these PNG-related issues
may
> not exist with the image editor Oleguer is using, so your mileage may
> vary...
>
> G.
>
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