This is the perfect mosque that I do. U all must have a question how i can do perfect while my sketch is to dirty and not so good. To do this I use pencil tool and warp tool to be perfect. First I use warp tool for adjust the point and use pencil tool for smoothen the line. Beside there is my layer that use for mosque.

This is the warp tool that i using for adjust the point

This the pencil tool that i use to smooth line of the mosque.