Beast Lightmapping is giving bad results in 4.0

Graphics Lighting & Global Illumination
1

Has anyone else noticed that the beast lightmapping seems to be much worse in Unity 4.0 than in 3.x? Here is a lightmap from 4.0 compared to 3.5 (I am on a Mac).

Beast Lighting in 4.0

1096932--41222--$beast40.jpg
1096932--41222--$beast40.jpg695×429 35.2 KB

Beast Lighting in 3.5

1096932--41221--$beast3.5.jpg
1096932--41221--$beast3.5.jpg717×435 36.6 KB

1096932--41219--$Screen Shot 2012-11-27 at 12.32.58 PM.png
1096932--41219--$Screen Shot 2012-11-27 at 12.32.58 PM.png695×429 103 KB

1096932--41220--$Screen Shot 2012-11-27 at 12.34.08 PM.png
1096932--41220--$Screen Shot 2012-11-27 at 12.34.08 PM.png717×435 100 KB

2

I’m not sure if this is related but I’m getting a serious bug with lightmap atlasing in Unity 4.0. See my question here.

Maybe check that your lightmap UVs are ok? Are you making your own lightmap UVs or letting Unity generate them for you?