I agree that for core parts it matters. But quoting the post by Joel: "If you’re developing a computer game where the plot is your competitive advantage, it’s

I agree that for core parts it matters. But quoting the post by Joel: "If you’re developing a computer game where the plot is your competitive advantage, it’s OK to use a third party 3D library. But if cool 3D effects are going to be your distinguishing feature, you had better roll your own."