WIP and warm-ups

I haven't posted anything in a little while, so I thought it was time to put up a few works-in-progress and some random warm-ups. The warm-ups are a bit of a mish-mash, the one sketch of the dude holding the head with some rough colours on there is taken from a leaflet for an opera (of all things) that I thought looked pretty mental. The rest are from random photos or anatomy books, I can't really remember which is which. The various scribbles are either rough ideas or works in progress of superhero drawings that I've got on the go just now, hopefully I'll have them at a bit more of a finished stage soon enough.