Lightmapping Shadow help

[DoctorWhy]

I have been messing with lightmapping all day now, but I can’t seem to fix a shadow (see picture).

I am using a spotlight with 100 shadow sample and radius of 0.5. The strange thing is the weird smudgy artifacts only show up near the edges of the cube, and as you can see, the shadow starts to look better the further it gets away. I have made the radius higher, and though that does get rid of the smudgyness, the shadows are way too fuzzy. Setting up the samples, even as high as 5000, changes nothing. I put the resolution up to 2000 with next to no change. I even set up the final gather rays to 5000 and still, next to no change. Is there some setting I am missing that is causing this issue?

Thanks for the help!

[DoctorWhy]

After a lot of searching, I found out that it probably had to do with the produced image resolution. After adding some code that exposes the Beast resolution, I was able to change it to 2048 (I also had to change them to import at 2048). Now it looks a lot better, but at the cost of bigger file size.

http://forum.unity3d.com/threads/56435-light-map-max-at-1k-solved?p=363206&viewfull=1#post363206

The other option would have been to break up the floor mesh into more than 1 mesh, which may produce a lot smaller images.