Wolfgang Wieser wrote:
> 
> [Talking about "16 bit image map pattern not working with isosurface"]
> 
> Christoph Hormann wrote:
> >Note this is probably an extremely bad idea since it does not work with
> >interpolation
> >
> I dare to object...
> 
> I think I have the mathematical proof that there is no problem
> with interpolation even when using two separate 8 bit images instead
> of one 16 bit set. You just have to use bilinear interpolation on
> both of them:

If you read the citation in my reply you cite here:

> > I busted my head over this one too for a while. I ended up using TGA's of
> > the 16-bit-for-height_field flavor and extracting the MSB and LSB by
> >
> > function{pigment_foo(x,y,z).red+pigment_foo(x,y,z).green/256}
> >
> > which is probably where you are almost at anyway.
> 
> Note this is probably an extremely bad idea since it does not work with
> interpolation and using not interpolated image maps will result in
> infinite gradients in the function.

you can see it refers to using a TGA like it is used for 16 bit
heightfields.  I really thought this was clear.  No need to make that much
fuzz about it because everyone who has ever tried this with interpolation
will immediately recognize it is a bad idea.

Christoph

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