The sun in the mid winter sky is low on the horizon. The 22 degree halo measured from the sun is formed by two refractions of the sunlight passing through the through tiny hexagonal ice crystals with diameters less than 20.5 micrometers. The light is refracted when it enters the ice crystal and again when it leaves.
I used a lot of paint on this small 5 by 7 sky scape - it was paint that I was going to have to discard if I didn't use it soon. The paint was thick and almost gooey. I loved it.