Hopefully they will ship a sample project/documentation next week with the stable release of 4.23 but if you want to dig into it early the 2 plugins you will need for their Off-Axis projection implementation are: “Warp Utils” and “NDisplay”. Then set your content browser view flags to “Show Engine Content” and take a look at the LED actors in the WarpUtils Content and the Reprojection Camera in the NDisplay content.