http://ptex.us/index.html
See it in action
(thanks solo)
Its already built in RenderMan Pro Server V15.0.CGdigg.com
Ptex, the texture mapping system developed by Walt Disney Animation Studios for production-quality rendering is now released as free open source.
- No UV assignment is required! Ptex applies a separate texture to each face of a subdivision or polygon mesh.
- The Ptex file format can efficiently store hundreds of thousands of texture images in a single file.
- The Ptex API provides cached file I/O and high-quality filtering - everything that is needed to easily add Ptex support to a production-quality renderer or texture authoring application.
Ptex was used for all textures in the Disney movie "Bolt"
Its now the primary texture mapping method for all productions at Walt Disney Animation Studios
The interesting part is of course the samples page
http://ptex.us/samples.html
Each sample includes an OBJ, a rib file, some renderman materials, and one or more ptex textures.
The question is "is that related or usefull for Octane ?"
I wish I had an answer
but I think we'll see in 2-3 years when Pixar (and Renderman) gonna look at GPU computing more closely.All that tech stuff make me drools
(but not as much as Octane 
)(ps: Im not working for Walt Disney hehe how sad)
Be warned that in the PTEX open source license you can read
The names "Disney", "Walt Disney Pictures", "Walt Disney Animation Studios"
or the names of its contributors may NOT be used to endorse or promote products
derived from this software without specific prior written permission from Walt Disney Pictures.
Been waiting for this. Now the rest of the industry have to implent this to there apps
)
