From 2018 to 2020, the 4D Research Lab (4DRL) gained experience in the concept of Blended Learning, using object recognition software and historical reconstructions. Spanning four different projects, this report 1) explains the goals and content of the projects, and 2) focuses on the technical documentation of a Unity project making a 3D model explorable using a Microsoft HoloLens 2. This report addresses the need for sharing the actual technical solutions to application development challenges.