On his website you will find lots of his artwork while in his blog you can review his concept sketches and his latest digital location sketches, the later are painted en Plein on a laptop computer with a small pressure-sensitive tablet and presented into this post gallery as well.
Obviously Patrick knows how to handle lighting creating special colour and shade layers in order to give a dramatic tone to his sketches, his work is truly amazing and worthwhile to be reviewed by all old fashioned and modern sketch lovers.