Is there a way to get the textures from the game? I don't know much about 3D graphics and such, but I think they might help me with some other type of fan art I want to make. *geek*

I can tell you how to extract the files, but I've long since forgotten how to actually edit them ^^;

1. Download Total Commander here.
2. Install it XD
3. Download WhiteWind's VFS plugin here.

(Copy/Paste'd install instructions)
1. Unzip the downloaded archive to any directory
2. In Total Commander, choose Configuration - Options
3. Open the 'Packer' page
4. Click 'Configure packer extension WCXs'
5. Type an extension suitable for the plugin, e.g. "lst" for diskdir
6. Click 'New type', and select the .wcx file
7. Click OK in all open dialog boxes.

Now, in Total Commander, use the window on the right to navigate to wherever you installed Pathologic and open up the "data" folder. Double-click the textures.vfs package and you'll be presented with a giant list. Use the window on the right to navigate to where you want to extract the files to. Now simply drag-and-drop the files you want.