I want to generate a STL file including a cylinder, a ball and a prism using
c = Cylinder[{{0, 0, 0}, {0, 0, 1}}, 1];
b = Ball[{0, 0, 1}, 1];
p = Prism[{{1, 0, 1}, {0, 0, 0}, {2, 0, 0}, {1, 2, 1}, {0, 2, 0}, {2,
2, 0}}];
t = Graphics3D[{c, b, p}];
Export["f:\\3.stl", t].
But I only find the cylinder when using "Import["f:\3.stl"] Where are the other two going? Thanks:)