Since we moved to 4.1, we are getting serious slow lightmaps baking time.
Scenes that used to take 5 or 10 minutes to build, now take almost 45 minutes to bake. I didn’t not change anything in my scenes, except now for an unknown reason Unity bake 2 maps per atlas : on with a lot for fluo colors (that is called “Scale”), and one which looks like the previous maps (called “Color”).
Any idea on how to decrease the baking time ? Or select only Colors maps ?
Thanks !
Hm, while i’m not lightmapping guy it seems you switched to Directional Lightmaps (Color + Scale). To get back to “only Color” probably means selecting “Single Lightmaps” mode in Lightmapping->Bake.
Also, if you are in ios mode - we switched to “best” compression for lightmaps - and while i dont remember exact version when - it will add some time, yes
Em’ - Could you eventually send a scene (bug report) of yours to Unity so they can replicate that?
Alexey - since when are you not the Lightmap guy anymore?
since the beginning of time 
How writing unwrapper qualifies me for whatever lightmapping? 8)
Thanks Alexei, my mistake, i feel silly ^^
I confused these 2 settings…
But, as we are, what is the purpose to those “scale” maps ?
Oh right you are only responsible for that unwrapping bug that causes me to go insane for the last 3 years. I forgot.
@EM’ - Can you post a picture of your issue if possible and did you by chance send a bug report and project?
@Thomas - there is no bug… he switched to Directional Lightmaps which understandably increased the bake times.
Oh OK my bad. At least it’s sorted then 