At A Year of Frugal Gaming Blog, the author has an illustrated article on his efforts to create a silicon mold to allow him to replicate various architectural parts for terrain making.
Modeling
Making An Urban Streets Gaming Mat
With all of the zombie games people are running these days, there’s got to be a big demand for a gaming mat marked with an urban streets grid. Skankgames has the solution.
Making “Forest Filler”
Another good article from Armored Ink: This one on making “forest filler” — the clumps of undergrowth on the forest floor.