Quick tutorial for all of you UE4 users!

1. Create a new material that looks like this: (Set the X and Y values to 64, this is the target X and Y resolution)
2. Create a new Post Process Volume in your level
3. In your newly created Post Process Volume, go to Rendering Features -> Post Process Material and click the + to add an item to the array.
4. On the choose dropdown, select Asset Reference. 
5. Select your Post Process material
6. Go to Post Process Volume Settings and toggle Infinite Extent to true
7. Then, select your camera
8. In the Camera Options toggle Contain Aspect Ratio
9. In the Camera Settings, set Aspect Ratio to 1.0 rather than 1.777...

And then you're all done! Ready to make your game! Good jamming!