In this section, we discussed the purposes of both 2D and 3D coordinate systems, their differences, and their uses in Unreal Engine 4. Furthermore, we took some time to go through the four perspectives offered in the engine: perspective, top, side, and front. Lastly, we looked at how to transform actors in our 3D world. With the concepts of 2D and 3D coordinate systems underneath our belt, you can now move forward and learn more about scalars and vectors.