Edge Blend to Soften Aliasing
A small edge blend can be used counteract aliasing. Typically, you may see this on the top edge of the Warp after exporting for a cylindrical screen.
In the Warpers blend settings, set the Top Global Gamma to 0
Increase the Top Width setting until the blend covers between 1-5 pixels
Increase the Top Global Gamma until you see a smooth transition to black
Repeat for all Projectors