Download: SketchUp Terrain Tutorial Part 2
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Part 2 of this tutorial will illustrate how to create flattened contour lines that can be exported to AutoCAD to be cut on the laser cutter for a physical terrain model. Jagged lines are traced over using the Bezier Curve add-on for SketchUp to get smooth lines. Note the error that was made at the end in snapping off of plane in the Z-Axis and make sure you don't do this!