Hello, I moved your thread in more appropriate location for UDK3 questions.
Also, your picture won’t show up so it’s hard to understand what is the problem
he’s trying to create an animated skydome in UE4 by following a tutorial for creating an animated skydome in UDK and he’s getting an error in the material, here is a link to the thread on the UDK forums(with a working picture, although when I click on it my antivirus blocks an attack).