Had fun doing a bunch of sketches again today. I will have to grab one and play with Photoshop CS3.
Added a whole bunch of extra detail to the Squarehouse Map. Still a huge amount to do if it is going to actually BE the squarehouse rather than just having avague resemblance. This image shows the current state of the walkway that heads to the gym and the front entry wall - you can just see through into the first studio as well.
[current state of the Squarehouse HL2 map]