I would look at the djx mattePassMaker mel script for Maya/MR. It makes it very easy to generate lots of matte passes in a single exr.
http://www.djx.com.au/blog/2010/08/30/mattepassmaker-mel/ ----- Deke Kincaid Creative Specialist The Foundry Mobile: (310) 883 4313 Tel: (310) 399 4555 - Fax: (310) 450 4516 The Foundry Visionmongers Ltd. Registered in England and Wales No: 4642027 On Sun, Dec 2, 2012 at 10:19 PM, franco cortesi <[email protected]>wrote: > maya and mental ray. we are using a script i made, it does the entire > render settings and setups render layers and passes on almost every shot of > a film. for the masks we use a window with some buttons wich creates and > assigns materials (rgb or "multirgb" surface shaders) in "RGBMask" > renderLayer. > > i'm thinkin about using two layers to keep objects without overlaping, so > we can use "multi rgb colors" with alpha to provide aliasing data. but also > it feels not really good for every situation. > > probably a mix of these two methods is the best solution but also it > sounds complicated :/ > > > found that: > > http://www.vfxtalk.com/threads/29303-Using-more-the-RGB-for-mask-channels > > ------------------------------ > From: [email protected] > Date: Sun, 2 Dec 2012 17:46:05 -0800 > Subject: Re: [Nuke-users] RGB Masks > To: [email protected] > > > Which renderer & 3d application are you using? There are many scripts out > there for automating doing rgb or matte only passes in an exr file. > Unfortunately as Nathan mentioned, object id passes are very poor for this > type of work. I’ve used them over the years for quick and dirty masking > but for anything with precision with proper masking, they never work very > well. > > ----- > Deke Kincaid > Creative Specialist > The Foundry > Mobile: (310) 883 4313 > Tel: (310) 399 4555 - Fax: (310) 450 4516 > > The Foundry Visionmongers Ltd. > Registered in England and Wales No: 4642027 > > > On Sun, Dec 2, 2012 at 3:51 PM, Nathan Rusch <[email protected]>wrote: > > The issue is that your objects overlap, and since most of those matte > colors contain combinations of red, green, and blue, your edge information > is lost in cases where any two overlapping objects make use of the same > channel. The only way to properly and reliably use this kind of color > scheme for matte generation is if your objects never overlap each other, or > if you can plan your distribution to prevent overlap in shared channels. > > You should really be rendering each mask to its own channel. > > -Nathan > > > *From:* franco cortesi <[email protected]> > *Sent:* Sunday, December 02, 2012 3:42 PM > *To:* [email protected] > *Subject:* [Nuke-users] RGB Masks > > i have lots of masks rendered like this one, with many colors, aliasing > and file format is exr 32 fp. > > in nuke i was planning to use a pluggin named j-ops, but the result of > separating those colors with this plugin is someting like un-aliased and > erode mask. > > using blur and matrix nodes to correct those problems doesn't give a good > result every time, so i'm searching for a solution, i think some keyers > probably? but also doesn't seems to be the best solution. > > > if there is another way (un-filtered+matrix for example, or by using > double resolution..) i'm also interested. but for now, i have to fix lots > of mask like those described. workflow is maya, with surface shaders for > the colors and aliasing. planing to use something like that with max if can > be possible. > > ------------------------------ > _______________________________________________ > 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 >
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