Very impressive! How long did it take you to make your own engine? Are you using any libraries at all?
only openGL. SDL is being used by the language, but all of that is hidden.
The engine took about a week to get running, but I did have all the work from the 3d editor which took months of tinkering and learning
Wow! I feel like all that experience would translate into better using / modifying other engines if that time comes (like better understanding rendering techniques etc so you can modify UE4's source to your liking). Keep up the good work!