For Oliver Fowls

Select faces to delete.

Remaining geometry following the curvature of the original model.

Extrude the edges.

Bevel the edges.

Sub-D smoothed.

A tweaked one to get a sculpted edge.

Above example smoothed

Of course as you push the vertices around you may need to adjust the distance between the the main body and the additional geometry so that it maintains consistency. In the above example I added some additional geometry to create the indentations.
Hope this helps.

Wooded Cliff

Sketch book study for an environment that I am currently working on , further updates will filtering in soon.

@ Phill (no..... not you Phil)....New Character Design

 I started with some uber loose sketch more to warm up rather than nail anything cohesive. I knew I wanted to draw a female character, with a post apocalyptic/ Steampunk vibe. I picked apart my initial sketches, noting were the anatomy was off and why.

 Once I had decided on a pose I blocked in a real rough idea, I decided that she should have two weapons, a flame thrower and an armoured glove (no doubt a bit Hell Boy creeping in there). This concept was taken a little bit further in the next stage with a bit more detail and the addition of a helmet.

 Final pencil sketch: I changed a few things on this piece  the three most notable changes are the pose of the right arm, the weapon and a sleeker helmet design. I changed the weapon because I liked the idea of Phills character getting blown out of the shy by a huge dollop of 12 gauge shot rather than burnt to a cinder as he lands. I altered the pose to make her a bit more dynamic and show of the physique a bit better. Talking of physique I wanted this character to be pretty athletic, after all she does wander a post-apoc landscape, fighting to survive on a daily basis, therefore she is going to be a fairly tough cookie.