Just to clarify, Poser only exports a small subset of the Renderman standard, specifically, only polygon information for describing Poser's mesh models. In order for a renderer to describe itself as Renderman compliant, it has to be able to import the full set of Renderman API calls, and implement a basic subset, including splines, Bezier patches and NURBs.

P5 may implement a few of these features, but even then, in order for the rendering engine to gain Renderman compliance from Pixar, it would still have to be able to import and render all of the required features, regardles of whether they are available or usable in the main app.

Renderman is not an application or a rendering method, its an interface standard (API and file) that allows seperate applications to share scene descriptions - Renderman compliance is import standard. Implementing it and gaining a compliance licence would seem to be extremely inefficient where most P5 users would either be rendering from within the application or exporting to third party applications or high end renderers.