In this exercise we can see the solar radiation in different seasons. So it's much important display all the protrusions.
I want to show the different solar radiation in Winter solstice and in Summer solstice and also today ( 24 Murch 2014 ) at 10:00 a.m.
The North-West faces are the less radiate in all period but the South-Est faces are more radiate, as we can look by the images.