Comments on: Label/Tag & Coverage пассы – LabelExtractor

By: Sagroth

Sagroth — Tue, 16 Nov 2010 19:04:57 +0000

LabelExtractor is shake-only node. Anyway, the same thing could be done in any compositing software (no doubts it applies to Toxic, though I’ve never used it). You just need to extract a solid color from label pass and multiply it by coverage. For a better anti-aliasing you need to add inverted coverage one pixel around selected label color (I’ve explained that in one of the comments above – #2). So, you just need to make these steps with toxic tools and that’s it.

By: Korinkite

Korinkite — Tue, 16 Nov 2010 04:56:28 +0000

You’ve mentioned Fusion, Nuke, and Shake as compositing programs that can be used to run your label extractor macro but you do have a script for a Toxik (Maya Composite) user like myself?

Nuke just keeps getting better and better but until I make the switch I’m stuck with Toxik :/.

Any help on the question would be greatly appreciated.

By: Ahmed

Ahmed — Sat, 06 Nov 2010 03:38:04 +0000

thanks Sagroth ,
it works fine u r the man

By: Sagroth

Sagroth — Thu, 04 Nov 2010 12:47:27 +0000

Not exactly the same, but really similar - here's the expression node, just copy/paste it into your nuke. You need to activate Tag color swatch in User tab and ctrl-click on the label color you want to pass into alpha:


set cut_paste_input [stack 0]
push $cut_paste_input
Expression {
 expr3 "r>(tag.r-tol)&&r<(tag.r+tol)&&g>(tag.g-tol)&&g<(tag.g+tol)&&b>(tag.b-tol)&&b <(tag.b+tol)?1:0"
 name Expression1
 selected true
 xpos 138
 ypos -108
 addUserKnob {20 User}
 addUserKnob {7 tol l Tolerance}
 tol 0.001
 addUserKnob {18 tag l Tag}
 tag {0.2160000056 0 0}
}

By: Ahmed

Ahmed — Tue, 02 Nov 2010 07:52:20 +0000

hey Sagroth,

thanks for the nice tut, do u have any idea how to write the same expression in Nuke ?!

By: pryaneek

pryaneek — Wed, 30 Jun 2010 13:31:28 +0000

Когда же уже будет продолжение статьи? (о том как собирать + сетап для Fusion)

By: Sagroth

Sagroth — Thu, 01 Apr 2010 18:23:14 +0000

Если под “гребенкой” подразумевается отсутствие анти-алиасинга, то да. Как это вытягивать в композе написано тут же в комменте #2, правда на английском. В кратце – нужен каверадж в пределах лэйбла и еще остатки вокруг этого лейбла – за его пределами. Я постараюсь в эти выходные сделать статью о том как это собирать – давно уже собираюсь.

С Fusion не работаю, но человек воссоздал в нем мой нюковский сетап по этому делу – думаю добавлю его к статье.

By: Ramon

Ramon — Wed, 31 Mar 2010 12:02:11 +0000

Скажи а если маски по цвету вышли с гребенкой то coverage пасс используется для anti-aliasingа? Как это потом сложить в композе?
со Fusion ты работаешь?

By: Sagroth

Sagroth — Thu, 07 Jan 2010 13:45:20 +0000

Yeap, I’ve found no way to output label as integers to be able to use it in comp (old shaders_p did that as well as I remember – with it’s own openexr writer). Shake supports custom channels from version 4.0, I think, but not tt. Maybe .map file would do – it’s supported by shake and, I suppose, it can store tag data. imf_copy to convert tt into map. You need shake 4.x anyway though to try it.

By: avak

avak — Thu, 07 Jan 2010 00:09:21 +0000

thanks for the response, Actually I am not very good (and I am lazy)in technical issues and I want to find an easy way such as the one that RPF format is doing for max users , as you now this format can save all data such as UV ,depth , object and Render id , coverage and etc. and then combustion can read them in a very easy way .just you need to load the RPF image and apply a 3d filter and mask the specified object based on its id (not rgb) …any chance for Maya and XSI users to have a format like this?
I don’t think exr can save object label information as integer id (am I wrong?)
any plugin for shake that can load tt file not only to load its RGBA data but also to load its integer data that it saves?

thanks for your response