The proportion rules are no longer interesting. Lately, we are seeing a tendency of human body illustrations with weirdly proportioned legs or heads giving great impact to these compositions. Wether it’s textured, colorful or just line drawn, these different styles are very nice and trendy. There are no boundaries to such trend, that are sometimes exaggerated. And like every exaggerated things they probably won’t last, so try it now if you are an art buyer or an illustrator yourself!