You could try going into the INI file and editing the texture streaming settings so that they don't stream out as much. Here's some info: http://udn.epicgames.com/Three/TextureStreaming.html or you can run the game with the texture streaming turned off. Just add these flags to your game shortcut: -MAXQUALITYMODE…
I'm working on a project and trying to push visual quality, unfortunately UDK is setup by default to MIP textures extremely aggressively. I have noticed a lot of people having this issue and they simply set the texture group to UI. This isn't really an option for me as I still want to help performance. I have searched…