Hi there, We are migrating our project to Unity 5. The code it's already working and no we are converting our scenes. We have a not to complex scene (around 40k poly) and the lightmapping is taking way to much time compared to the "old" Unity 4. Well, thats not the reason of this post. We are seeing that unity stretches the UV when generating them for lightmaps, even if you create them in the 3d package. There was an old post about this: :http://forum.unity3d.com/threads/enlighten-and-preserving-uvs.281102/ It's seems that it keeps happening. Unity is stretching the lightmap UVs even if you just use the default Unity cube.