Modern 3D medical scanners generate large data sets that lend themselves well to volumetric rendering. Unfortunately, such renderings can be expensive to generate, and if users must be able to manipulate them interactively, the cost can become prohibitive. Real-time volumetric rendering of medical data is therefore an area ripe for application of performance engineering techniques. In this presentation, Jesper Bojesen of UNI-C will describe his experience with applying such techniques to the implementation of a Software Development Kit (SDK) for volume rendering applications. The presentation will center on design and implementation specific aspects of this work and is part of next week's Copenhagen STL meeting, but as always, anyone interested is welcome to attend.