Allegorithmic have posted a video to overview the user interface of Substance Painter.
Substance in Unreal Engine 4 Tutorial Series
Allegorithmic have created a tutorial series that covers how to use Substance with Unreal Engine 4.
Substance Designer 5
Allegorithmic has announced Substance Designer 5, the new iteration of its node-based texturing hub for game artists.
Volume 1: the Theory of PBR
Allegorithmic have released the first volume of two on a comprehensive PBR guide.