aPriori uses a third-party component from Tech Soft 3D called HOOPS for displaying graphics. aPriori can be configured to use OpenGL or OpenGL2. As of 2019 R2, DirectX 11 is the default Graphics Driver for aPriori.

A list of tested drivers is posted here: http://developer.techsoft3d.com/hoops/hoops-visualize/graphics-cards/