Improvements
- USDScene : Added
IECOREUSD_WRITE_CONFORMANT_RENDERMAN_ATTRIBUTESenvironment variable. If set to a value of1, this causes "ri:" prefixed attributes to be written as expected byusdRiPxr.
IECOREUSD_WRITE_CONFORMANT_RENDERMAN_ATTRIBUTES environment variable. If set to a value of 1, this causes "ri:" prefixed attributes to be written as expected by usdRiPxr.