Cobalt sky versus blue sky

Like some guys don't like the dark "cobalt sky" of the "Basic DMU island" we
have create another island having a clear blue sky. So, you can use that having
the cobalt sky at:

http://www.dmu.com/cobalt/DMU.c3d

or the new one at:

http://www.dmu.com/cobalt/DMUb.c3d

We can think about night versus day....  ;-)