SL stands for Scene Library. It is developed at the Berne University of Applied Sciences (BFH) and used for student projects in the cpvrLab ( https://www.cpvrlab.ti.bfh.ch/). This demo application shows you what you can learn in one semester about 3D computer graphics in real time rendering and ray tracing. During the semester we built this framework in C++ and OpenGL ES 2.0. The framework runs without changes on Windows, Linux, Mac OSX, Android (>=2.3.3) and Apple iOS (>=5). The framework can render alternatively with ray tracing which provides in addition high quality transparencies, reflections and soft shadows. Go to the homepage and download the source code.