^ Then do it. CAD drawings don’t have to be insanely complicated to be CAD drawings. The only real requirement is that it’s created within a CAD software. AutoCAD, Inventor, Vectorworks, SolidWorks etc. are all acceptable tools and I believe all of them have the ability to render solid shapes and add color. Not every CAD drawing needs to be wireframe with 7,000 constraints and dimensions plastered throughout. It was a reference image to show the track based on some measurements, and i don’t see why someone would lie about the type of drawing it was, so I’m unsure why you’re questioning that point specifically.
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