Hmm, it's a different area, but there doesn't appear to be any major differences. I'm curious as to what the hell is going on with that alleyway and the GI setting at 16, because I'm currently reproducing it after several restarts now.
I've checked. With me at 0 or 16 I get what you had at 16, the grass in the ally being bright but at 32 and up (32, 48, etc) I get it being dark like it should. At 32 it also runs better. I'm going to just leave it there as it seems to run better but look more or less the same.
Ok, thanks for the report. It appears there's something wrong with setting it to 16.