Photogrammetry turntable backgrounds - free to use

This week I successfully tested out some photogrammetry backgrounds - these are intended for use in photogrammetry of small objects that can be placed on a small turntable. In my method of photogrammetry, I use the background to help match points within a photo set. As explained in my long post on photogrammetry, you can either delete the background from every photo (extremely difficult), try and use a white featureless background and overexpose the image (very difficult), or manage to use a different background in each set of photos. For large objects you can do side A and side B in two different locations (e.g. two different rooms), thereby forcing the software to match points only on the object. If you take two photosets of different sides of the same object on the same tabletop, the software will match points on the tabletop and you'll have a failed model.

In this case, if you fill the frame of the camera with these turntable backgrounds, and put the object in a different orientation for each background, it's the same effect as moving a larger fossil to different locations: the software is fooled into matching points only on the fossil. See the photogrammetry post for more information. Here are the files below - scale them, and print them to the diameter of the turntable you have.  You can make your own as well - just make sure you have zero repeating patterns or symbols! I made these in a couple of hours in Adobe Illustrator. 

Go forth and make some great 3D models!