Finally, there is a method of capturing complex shapes that can quickly and accurately reproduce the shape on the computer, but at a considerably higher cost. There are many ways to 3D-scan objects.

Photogrammetry, or building a model from photographic references, captures the details of the shape of the object, but doesn't capture the scale very well. It captures small or big objects without distinction, but the resulting model can't be used for measuring purposes very well.

Structured light scanning can capture the scale pretty well if it's calibrated, but depending on a number of factors, the geometry may lack fine details. Often, scanners may cover that up by texturing the object, but textures don't print on FFF printers, which makes the cover-up obvious.

Some 3D scanners can only scan small objects. Some can only capture larger objects, but without any degree of small detail. Some require considerable effort on the part of the user to achieve any results. And if a 3D scanner does offer high detail and measuring accuracy, chances are it comes at a cost prohibitive to home users.

3D printing has driven up demand for accurate and cheap 3D scanners. There are many options available and new ones being developed all the time. As of the time of writing this, there is no clear family of winners that can be pointed to yet. Be cautious. Many promises are being made; not as many promises are being delivered on. But keep an eye out because, one day, a reliable, accurate, and affordable 3D scanner is sure to be made.