I share Deke's experience with ID passes. I always go with standard (RGBA)
mattes.


On Mon, Mar 25, 2013 at 1:40 PM, Deke Kincaid <[email protected]> wrote:

> In my experience ID passes are not that great to use for masks.  There are
> gizmos on nukepedia which pull keys on the color but they are often
> bleeding color into other channels because there are colors which aren’t
> even secondary(pink, light green, etc..) and the pass is not anti-aliased.
>  Also anything semi-transparent like glass or motion blur is an instant
> fail.  It is much better to render a bunch of separate mattes to channels
> in an exr file.  Nuke lets you have up to 1024 channels, so you should use
> them :)  I haven’t seen a script for arnold yet but there are many for MR
> and Vray to auto generate matte passes in separate channels of an exr for
> objects in a scene.
>
> -----
> Deke Kincaid
> Creative Specialist
> The Foundry
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>
> On Thu, Mar 14, 2013 at 9:09 AM, letin210 <
> [email protected]> wrote:
>
>> **
>> Hi there,
>>
>> Has anyone never tried to work with ID pass generated from Arnold render?
>> It could be very useful to get all the ID passes on one layer, but I
>> cannot figure out how can I manage it.
>>
>> Cheers,
>> Letin.
>>
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