The first the I worked on was the interior. To keep it from being boring, I thought it would need stuff in it, which lead to this:
Ultimately, rather than a wall hanging, these wound up in the final project as the character's sword. I also decided to light the interior with torches:
Once I'd had the idea of using torches, it was a short leap to creating a long hallway of torches, and then having them light sequentially sending light down the hall (and effect I've always liked):
I then moved on to creating the "character of the animation" opting to go for an arm:
Apparently, joints don't scale down in size when you attach them to small objects, so there is a lot of overlap and it's difficult to distinguish between the joints for the shoulder/elbow/wrist/two knuckles per finger. This was a situation where I was extremely grateful for the Outliner.
The next step was attaching the arm to the camera (consequently making the tangle of joints even worse, but beyond a certain point it doesn't really make a difference and it was all still fully functional):
I made created significantly more shadow in the exterior than had existed in the mid term version, so I decided to give my character a portable light source. Initially, I wanted to have him carry his own torch around, but there was some difficulty scaling the particle effects properly and so I opted to create a lantern for him instead:
The final end result: