Proscene v2.0.0-alpha2 is out. Download it here
and extract it to your sketchbook
libraries folder (automatic importing proscene from your PDE is only available for stable releases, currently v-1.2.0).
Respect to the first alpha, this release implements full matrix handling in core, making possible to perform all geometry transformations directly by proscene2. Actually, this is part of a more general idea: to make it possible to run proscene2 within other contexts different than Processing. Please refer to the new example Basics.MatrixShader. I hope to give more details here soon.
Currently, we are performing more experiments to decide what experimental stuff will make it into the upcoming cycle. We plan to release a pair or so of more alphas with our results before entering beta stage.