is still stuck with the dang perspective drawing since I'm not really good on that. managed to find some useful video,especially this site-.-|| 一点通阿! by just looking at the picture drawn by the artist,without tutorial-.- it actually solved the problem I've been thinking for almost a MONTH. http://freedrawinglesson.blogspot.com/ Great artist,I would say.
and I managed to solve the problems I had in constructing a spiral shape-.-+