[Sidefx-houdini-list] unpremultiplied rendering?

quinn qrichardson at quinessa.com
Mon Jul 19 11:39:57 EDT 2010


Flame/Inferno can deal with it. The ops may not like it... but they can deal with it.
In the main compositing node - Action - there is a little checkbox for divide that sorts it out.
Beyond that... you can add a logic ops node to divide. No big wup


On Jul 19, 2010, at 11:34 AM, John Coldrick wrote:

> On Monday 19 July 2010 11:27:12 am Larry Giunta wrote:
>> As for the goal. The main reason we get requests for un-premultiplied
>> passes is usually when it's a keyable element ( intended to go over
>> footage or a live feed, etc),
>> and the rendered element has transparency of soft/ramped edges ...or
>> motion blur etc.
> 
> 	Sounds like flame/inferno! :)
> 
> 	Yeah, my attempt to stir rage and discord, resulting in the CG world 
> DEMANDING that certain compositing packages just DEAL WITH IT, has failed.  I 
> shall now retire to my cave and grumble the rest of the day...
> 
> 	Cheers,
> 
> 	J.C.
> 
> ---
> John Coldrick
> 416-504-0425
> jc at axyzfx.com
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