Summary: Version of those libraries might be useful to know. - OIIO and OCIO is exposed via bpy.app.oiio and bpy.app.ocio. There're "supported", "version" and "version_string" defined in those modules. - OSL is available as _cycles.osl_version and _cycles.osl_version_string. Reviewers: campbellbarton Reviewed By: campbellbarton CC: dingto Differential Revision: http://developer.blender.org/D79