I've applied a checkerboard texture to each piece of the model. At first, the checkers look stretched out. After correcting the UV mapping coordinates on each model they look much more uniform.
If you're new to the concept of UV mapping, you'll probably still remember this one from school: how do you wrap a flat map around a globe, and vice versa? That's the same sort of problem as UV mapping. The answers lie in various types of projections. I used a mix of planar and cylindrical projections, along with some automatic layout tools and a bit of manual editing.
Once each object has reasonably good UV mappings, I'll be able to create materials for them, such as wood, rope, and iron.
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