Re: [GSoC 2013] Advanced Rendering Techniques - Skin/Hair

Hey Christian,

You're right about the normals being computed dependent to the camera. The
reason is that you want these hair strand meshes which have no depth to
always face the camera so they don't disappear.
However, we should be passing another set of normals oriented as the
normals on the head mesh to do the Marschner computations on. This might as
well be the issue!

Thanks,
Alex.


On Mon, Apr 22, 2013 at 5:04 AM, Christian Van Brussel <
[email protected]> wrote:

> > I'm not sure but my guess is that there might be
> > something wrong with the tangents.
>
> I always supposed that there is at least an issue with the normals of the
> hair strips: AFAIK they are computed in order to face the camera, although
> these normals should not be dependent on the camera position (and for
> example, the current aspect of an hair strip vary unnaturaly when you
> rotate the camera around). The normals of an air strip should a priori
> never vary unless the shape of the strip is changed.
>
>
>
>
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