Hi Darin!
Long time no hear.

I doubt it - ptex files are not normal 2D textures so Nuke's current 2D 
structure won't support them out of the box.  There's probably some wacky way 
to shove the ptex data into the existing float buffers but none of standard 
Nuke nodes would know how to interpret the data.
It's impractical to unpack as well as you may need hundreds of different layers 
all at different resolutions.

Likely Nuke's 2D system will need to be extended like it was to support Deep 
data in order to support the packed encoding of ptex.  Perhaps the Foundry is 
already working on this - you should ask.

-jonathan

On Oct 11, 2013, at 11:19 AM, Darren Poe wrote:

> First off let me say I'm pretty new to ptex... But if say I paint on an obj 
> model with no UVs in mari, is it currently possible to bring that texture 
> into nuke and apply it directly to the obj?
> Thanks,
> 
> -Darren
> 
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