Tim Cook wrote:
> Stefan Viljoen <spamnot@ wrote:
> 
>> I'm impressed! NASA maps?
> 
> 
> Yup.  The new Blue Marble dataset...5400x2700 version, June.

Well - lighting does not fit that time of the year... ;-)

> I'd really 
> like to play with the 500m/pixel set, but don't have any way of doing 
> so.  Would be nice if POV 4 were able to use very large images without 
> loading the whole thing into memory...

Obviously you can't use image data without loading it, that's trivial. 
Accessing parts of an image without reading it as a whole in advance 
would be quite straight away (at least for uncompressed image formats) 
but only of very limited use:  If your render accesses only small parts 
of the image you should only use a reduced size image in the first 
place.  If your render really needs the full image that is larger than 
your memory you will suffer significant performace penalties with this.

Christoph

-- 
POV-Ray tutorials, include files, Landscape of the week:
http://www.imagico.de/ (Last updated 31 Oct. 2005)
MegaPOV with mechanics simulation: http://megapov.inetart.net/

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