http://docs.autodesk.com/MENTALRAY/2015/JPN/mental-ray-help/files/manual/upgrading312.html
the link would help.. On 7 December 2014 at 17:54, Rob Chapman <[email protected]> wrote: > re: renderman dual scattering in softimage, appears someone has it working > in 3delight > > https://vimeo.com/19108621 > > also someone at mental ray did implement a dual scattering shader for 3.12 > - see here for details under human hair, not sure if its included in 2015 > or not look for basehair > > best > > Rob > > > > On 6 December 2014 at 20:53, Anto Matkovic <[email protected]> wrote: > >> Custom Rman shaders available around, they are only 'core' part. Even you >> can apply them as 3dl property, you can't get proper point-based GI in most >> cases, especially not path traced GI, MIS an so on.Custom color mapping, >> coming from SI, won't work too, of course. >> All of free Marschner Rman shaders are single scatter model ( single >> scatter = Muh Hair). Implementation of fancy dual scattering model, this >> seems to belong to additional coding in RMan and 3delight, not a plain RSL >> - so, unless Pixar will have a mercy, don't believe you'll be able to get >> the dual thing in upcoming Renderman, too. Maya or SI, doesn't matter. >> >> Perhaps the shortest path for one man band and single machine, it is to >> just hack the RSL of 3dl emulation of SI hair shader, add code for shifted >> highlight, map the parameter to something unused in PPG ( 'flat light' for >> example), use two or three opaque shaders in render tree, pass the result >> through constant shader for transparency and GI, at the end. 3delight is >> quite good in optimizing the structure of this kind. But this is really a >> hack. >> >> Regarding Mr, old Muh Hair definitively won't work, but there is a chance >> to get working version of p_HairTK, somewhere. Or, maybe, working >> implementation of built in 'basehair' in latest Mental Ray 3.12. Both are >> single scatter model, but, still more than out of the box solution. >> >> ------------------------------ >> *From:* Leendert A. Hartog <[email protected]> >> *To:* [email protected] >> *Sent:* Saturday, December 6, 2014 1:55 PM >> *Subject:* Re: realistic hair shading SI-MR >> >> Any chance of achieving better results with 3delight (as it's so "budget >> friendly"), possibly with custom shaders? >> >> >> >> >> Greetz >> Leendert >> >> -- >> >> Leendert A. Hartog AKA Hirazi Blue >> Administrator NOT the owner of si-community.com >> >> >> >> >
