Any tips how to optimize Slate (UMG)?

Yes it’s simple, you guys should port tappy chicken ui to UMG and see by yourself that performance on ipad2/ipad3/iphone4 is really bad. I haven’t seen any UI example from you guys with finished graphics and functionality - I’ve seen only examples. It’s something that you should think about.

Heres screen with SScissorRectBox. Basically we are using Overlays/HorizontalBoxes to get the same results on all resolutions. (game is iOS/Android/Steam)