Why does my static mesh have weird mark pattern after lighting build?

Hello,

I am using 4.4 update preview.
I just imported a .fbx as static mesh, droped it in the scene and it looks ok before lighting build, but after I build, the mesh has some weird marks on it.

Anyone knows how to get rid of them ?
Thank you.

Before:

11859-screen+shot+2014-08-04+at+17.28.42.png

After:

11860-screen+shot+2014-08-04+at+17.29.06.png

Hi,

It looks like you may need to setup a second channel UV for your lightmap. You can do this in your 3d modeling software that you are using.

If you have already setup a second channel for your lightmap make sure to increase the lightmap resolution in the mesh viewer/editor or the details panel. The default resolution is 32. Try something like 64, 128, 256 to see if that helps.

Thank you!

Tim