Ahh thanks Ed, that's exactly what I was looking for. Eric
Freelance 3D and VFX animator http://vimeopro.com/user7979713/3d-work On Thu, Jan 23, 2014 at 11:09 AM, Ed Manning <etmth...@gmail.com> wrote: > on the material you want to have generate the matte, use a rayswitch to > make refraction and transparency rays white, all others black (or a > different color for each, whatever you need). Then make the other object > 100% transparent with a refractive index of 1, and turn off its > shadow-casting abilities. > > > On Thu, Jan 23, 2014 at 11:00 AM, Jeff McFall <jeff.mcf...@sas.com> wrote: > >> There is a handy booltrace shader by Alan Jones on http://rray.de/xsi/ >> >> >> >> That maybe sounds similar to what you are looking for >> >> >> >> Jeff >> >> >> >> >> >> *From:* softimage-boun...@listproc.autodesk.com [mailto: >> softimage-boun...@listproc.autodesk.com] *On Behalf Of *Eric Lampi >> *Sent:* Thursday, January 23, 2014 10:55 AM >> *To:* softimage@listproc.autodesk.com >> *Subject:* Matte from Geo intersection >> >> >> >> Can anyone offer a suggestion how to achieve this? >> >> Just a simple matte on an object where another one is intersecting, so >> the surface inside the volume is white, outside is black. The volume itself >> would be hidden. >> >> The geo isn't very dense, someone here suggested generating a wieghtmap >> via ICE, but it won't have enough resolution. >> >> >> >> Eric >> >> Freelance 3D and VFX animator >> >> http://vimeopro.com/user7979713/3d-work >> > >
