Lights doesn't make a nice result on my meshes

hi guys,

the version is 4.4.3

and this is the UV generated by UDK4 mesh properties:

bac08d3b54ffc42f6d2030fb83d2fbb0ad7aba78.jpeg

i don’t know if there are another way to generate this UV in the UDK editor… I tryed to make the UV from Blender but the result is the same.
I would like to know if there are a way to simplify the build light process because i would like to get a ver smooth result of shadows… not sofisticated.

My project is a third person code project… so i have a lightmass volume on my all assets.
the ligmtmap resolution? how can i change this option… i just try the 3 options of build lights: Preview, high and production mode, but the result is the same.