Hi Mike, that sounds awesome, and Howard, point taken that it may be secret sauce ;) It's a bit of a holy grail being able to easily do fast glossy spec importance sampling even though it's not full ray tracing.
I created a gizmo and put it on Nukepedia a while ago which was my hacky look at prefiltering an environment map. Nukepedia is down right now but it's called EnvConvolve. Basically it convolves the image based on a specular brdf but it's not a complete solution by any means. On 3 June 2013 13:29, Mike Wong | artixels.gmail <[email protected]> wrote: > Hey Horward, glad you responded to Michael, i missed it somehow and thank > you for checking other vids too :) > > Escher glossy shader is a bit more than just a lookup, it samples > additional points from the lightprobe based on simple importance sampling > and then it further allows you to prefilter each sample, the prefiltering > is done via an on-the-fly precomputed integral image . Such combination > allows a speedy and two-level control of the glossiness. By the way, the > SH can do phong shading if you prefer another look. SH + glossy are good > friends :) > > Best, > Mike > > > On Tuesday, June 4, 2013, Howard Jones wrote: > >> Think you're supposed to buy it not take their trade secrets ;) >> H >> ------------------------------ >> *From:* Michael Garrett <[email protected]> >> *To:* Nuke user discussion <[email protected]> >> *Sent:* Monday, 3 June 2013, 17:40 >> *Subject:* Re: [Nuke-users] [plug] Escher Spherical Harmonics tools >> >> Thanks for posting this! How are you doing the glossy specular? Do you >> calculate more coefficients or are you just looking up along the reflection >> vector? Also how are you raising the specular power when doing specular? It >> looks good even if it's not "accurate". >> >> >> >> On 3 June 2013 04:15, Mike Wong | artixels.gmail <[email protected]>wrote: >> >> Hi Nukers, a short video of Escher SH tools, thanks ! >> https://vimeo.com/67543236 >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> >> > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >
_______________________________________________ Nuke-users mailing list [email protected], http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
