3840x4320 vert x2 SSAA - Runs the game at double vertical res for balance between look and performance for super samling. Aspect is still 16:9 so run fullscreen scaling in stretched and bilinear when activating this option.
Light res x2 - Doubles resolution of light sources and mitigate light haloing around object edges.
### Nice to know when creating a custom resolution
There are some issues with AO and light sources, to mitigate this some “sub” viewports need to scale evenly. XCX uses a similar approach to get smooth shadow transitions.