Evolution of a Mural 
I have my own way of working as do all artists, but mine is really a little different...
After I have a sketch the clients love I then start  work on the wall.
I do not sketch anything in pencil on the wall before I start.
I do all mural placement using painter's tape.  I then do everything using my paintbrush without sketching.  
My brush shows me the way...
Clients are always surprised and fascinated watching my process, so I thought I'd put my system on our web page.
All my work is done freehand, never traced.  I am old school!