For this chapter, we diverted away from AR a little and explored mixing augmented and mixed reality. We discovered that we can easily experience mixed reality apps with a simple device called a HoloKit or other cheap headset. ARCore tracks the user well and is a great fit for adding the MR experience. Who knows, in the future when everyone is wearing MR glasses, will we even distinguish AR and MR as different? We then set up the HoloKit template app and went to work building a quick MR demo. After that, we expanded on our demo by adding in WRLD. WRLD, as we learned, is a fun and easy-to-use API that can quickly give us some large-scale impressive 3D scenery that is representative of the user's area. From there, we developed a number of scenes for all the users to move a map touch interface to a full mixed-reality view of the map, where we were able to obtain the user's geographic coordinates from their device's GPS and put them at the same position in WRLD. Finally, we looked to the future and industries that you can focus your app development skills on.

We complete our journey in the next chapter with a discussion of performance and troubleshooting, both of which will be helpful as you grow your skills to become a better AR developer.