There's a 16-bit PNG Photoshop plugin available free at this site:

http://www.fnordware.com/

I've downloaded and installed it, but I haven't tried it out. Seems like 
it should work though.

RJay


In article <3D629F5F.62C6C9B5@swipnet.se>,
 Tom Stone <tom### [at] swipnetse> wrote:
> 
> I've tried that, but unfortunately GraphicConverter doesn't support 16-bit
> images. Would love to use 16-bit PNG files for heightfields, but so far I
> haven't found any way to create them.
> 
> Although, I've finally found another way to create16-bit heightfields for POV:
> 1 - Open or paint an image in PhotoShop.
> 2 - Convert to 16-bit colors.
> 3 - Convert to Grayscale.
> 4 - Save as RAW (and make a note of the dimensions of the image)
> 5 - Open MacDEM ( from http://www.treeswallow.com/macdem )
> 6 - Import as RAW
> 7 - Export as Povray 16-bit TGA
>

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