Hi Stuart,<div><br></div><div>So, are you not pursuing implementation of the Marschner model or the Zinke model? Or is that in the pipeline as Brecht mentioned? The Sadeghi model is very popular with artists and gives them great control over all the components of the shader. I am familiar with the implementation of the dual scattering model that Sadeghi et all have provided. It is definitely a big help in understand dual scattering and I hope I get a chance to implement it. Thanks for the details on the current implementation. </div>
<div><br></div><div>Regards,</div><div>Girish</div><div><br><div class="gmail_quote">On 22 April 2013 06:39, Stuart Broadfoot <span dir="ltr"><<a href="mailto:gbroadfoot@hotmail.com" target="_blank">gbroadfoot@hotmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div dir="ltr">
<div style="font-size:10pt;font-family:'Arial'">
<div>Hi Girish,</div>
<div> I would really welcome the addition of dual scattering. For
now the scheme that I settled on for the shader is the one proposed by Sadeghi
et al (2010), with the R,TT and TRT components being calculated using
approximations given by J. Ou et al (`ISHair: Importance Sampling for Hair
Scattering’). Sadeghi et al explicitly mention dual scattering in regards to the
diffuse component and give some details on the implementation, that you may find
interesting. I decided on this over other physically accurate models since it
does not require pre-computation and is quite artist friendly. More advanced
models can definitely be added later though.</div><span><font color="#888888">
<div> </div>
<div>Stuart</div></font></span></div></div></div>
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