Hi Ben
Little update on the hair progress on our site. As I have said, we have the same problem with hair and framebuffers. I don't know if
you have got any working hair framebuffer, but I found an very easy way to get framebuffer support for hairs.
I have written a small shader for XSI 5.11 32bit, which just outputs the hair transparency.
If you plug this shader into the matte of the BA_color_switcher, then you have framebuffer support.
Ok, it does not split specular/diffuse/ambient of a hair shader, but as a workaround you can use multiple hair shaders for different
BA_color_switcher inputs.
Important Notes: Don't enable the sprite mode in BA_color_switcher. Disable all transparency stuff in your hair shader. The
BA_color_switcher shader takes the raydepth into account, you need to increase it.
http://www.BinaryAlchemy.de/download/BA_hair_trans.zip
Holger Schönberger
technical director
The day has 24 hours, if that does not suffice, I will take the night
|> On 12/5/06, Ben Barker <ben.barker(at)gmail.com> wrote:
|> > I am trying to modify a shader (specifically muhHair) to
|> spit out pass
|> > channels for ambient, diffuse, and specular. I've got it
|> spitting out
|> > the data correctly, but the data is wrong. I'm pretty
|> sure this is my
|> > fault but I can't find where the problem is.
|> >
|> > It works fine if transparency is disabled and I just
|> spit the pass
|> > channel color straight into the frame buffer. Otherwise, I am
|> > multiplying the current pass channel color by the
|> transparency color,
|> > getting what is already in the frame buffer, adding my
|> color, then
|> > setting the frame buffer again. Essentially trying to
|> accumulate the
|> > color inside the frame buffer.
|> >
|> > My images are ending up totally blown out , like way to
|> much stuff is
|> > being added, bad stuff. I tried the XSI hair shader and
|> the XSI Phong
|> > shader, and these don't take transparency into account
|> at all when
|> > returning pass channels, so I am wondering if there is a
|> known issue
|> > about this. Transparency doesn't matter that much for a
|> Phong I guess
|> > but for hair it has to be there, or else the pass channels are
|> > worthless.
|> >
|> > Thoughts?
|> >
|> > --
|> > Ben Barker
|> > Character TD
|> > CafeFX
|> >
|>
|>
|> --
|> Ben Barker
|> Character TD
|> CafeFX
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