Don't work on the details unless you have blocked in all major shapes!
This is what is written in the books. On Saturday I tried to do some mythbusting apparently and followed the temptation to finish the focal area at a very early stage. I took the photo some 90 min into the painting. After that it just got worse and worse and I messed it all up. I wiped it all off in frustration after 5 hours or so.
Myth not busted!
