Map UDK to UE4

Thanks for the tip!

UDK3 and UNREAL ENGINE 3

I want to know that if i m using UDK3 can i use udk3 maps Unreal Engine 4 or Vice versa.

Read the second post.

There’s a tool someone made that can help move some things over, it’s not a complete solution, but it’s better than nothing.
As for going from UE4 to UDK, that’s not possible in any way

So udk/ue3 level maps files extension format was .upk,but as for character model and animation assets it was .psk,.psa right? Same for ue4,but maps are .pak files,right?

Those files are not compatible with UE4

.fbx files only?