From real Chinese traditional pavilion architectural structures, it is well known that there are many curve on their roof parts which are also the most classical and shining parts of a pavilion. I started to sketch from floor to the roof as what I did last time. Because the roof’s curves structure and angle is hard to adjust in the beginning, I sketched a rectangular pyramid as the line of reference. Then I used spots to sketch each support curves of the roof part. In the end, I used two/ three or four edge lines to build up roof surface.