Maxwell Render

maybe I'm not getting what you mean, but it is antialiased (you can tell that by looking at the different shades of grey pixels which make up the sphere's contour), what you see it's just a 200% or more blowup of mike's rendering.

It seems to me that the working one is the one that is aliased (no gradient). The others produce some interference between the background and the object.

Edit: maybe i misunderstood, so what is the aliased picture? Is it an alpha channel or an aliased rendering? whatt ever is it, how can i get such output?

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Hyltom, Industrial Designer,
Rhino3D 4.0 - Maxwell 1.7.1 ... Q9400 - 4GB RAM

nope, the alpha channel it's exactly the same in both cases. what changes it's the rgb channel, in one case it's premultiplied and in the other one it's not.
anyway, any compositing app will correctly deal with multiplied and non multiplied images (ps it's not among them unfortunately), giving always the correct result.

I guess you have to go to the wishlist section, and ask the guys over in madrid to add the option for choosing between premultiplied and straight alpha images.

Ok, i think i understand now...but if i use after effect instead of PS, can i get the correct result with what maxwell output?

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Hyltom, Industrial Designer,
Rhino3D 4.0 - Maxwell 1.7.1 ... Q9400 - 4GB RAM

yep, totally

Thanks Rivoli, your answers was very helpfull. Now i have to save a lot of money .

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Hyltom, Industrial Designer,
Rhino3D 4.0 - Maxwell 1.7.1 ... Q9400 - 4GB RAM

actually you can get away with ps and alphas as well. it may get a bit of working around but it can be done. I'll try to post something later, at the moment the pc it's a bit busy.

Very interesting, thanks for the explanations all!
As Hyltom, im a bit confused cause i have anti-aliased alpha too...

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http://www.def4D.fr

Hyltom and def4d, in Mike's example there's no aliased alpha. That aliased image is an oversprayed beauty pass talking about another technique. Maxwell's method is pre-multiplied. So, no matter which application you use, you need to make straight alpha removal and then black matte removal in order to have it perfect.

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Next Limit Team

Help! I cannot get the alpha to paste into the mask layer. It just pastes to a new layer. Not into a linked mask layer. I find no way to open the mask layer like the tutorial video shows! Can anyone help me quickly!!!

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Daniel Hruby
AIA | LEED AP
http://www.visualizeitbuilt.com

OSX 10.6.7 Snow Leopard
MacPro 3.0 GHz 8 Core 12GB
ArchiCAD 14 • Modo 501 • Terragen 2.3

Daniel--

Have you tried Tom's action? You need both images open for the action to work properly

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Rhino4.0/3DSMAX 2012
MacPro OSX10/WIN7 Pro x64
dual dualcore 2.6 GHz|12GB RAM|256MB Nvidia GeForce 7300 GT
****
BOXX 4860 Win7 Ultimate x64
i7 950 3.07GHz|12GB RAM|1GB ATI FirePro V4800

Alt-click the mask part of the layer to make it active, then paste.

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Brian Looney
Maxwell + RealFlow
http://lunatic-studio.com/
Help! I'm dispersing into a haze of probability!