Hiya so ive got a bit of an issue with my lighting I am working on a modular environement and the light seems to affect meshes differently

since i was wondering if it was a rotation problem i looked into this thread
http://www.polycount.com/forum/showthread.php?t=94585&page=2
but unfortunatly i also tried to simply place the meshes into a new scene without rotating them the result was pretty terrible aswell

all the meshes have very similar UVs but there are minor differences
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For some reason UDK decides to randomly render my duplicated meshes different values.