digital artist, with lots of time, photogrammetry helps to solve this issue by trans-
lating complexity in the real world into low-to-medium complexity in the digital
Now that you have learned about how to create the images, you will probably want
to print the object. If you want to 3D print something you created with photogram-
metry, you will most likely have to fix the file before it is 3D printable. In this case,
“fixing” means finding the holes in the models where information was not collected
and “filling them in” to create a solid model. The work that needs to be done is
more of the “cleanup” variety than anything that would require a deep knowledge
of 3D modeling. We discussed this process earlier learning about Meshmixer in
EXAMPLES OF WHAT YOU CAN CREATE IN
Models created in a photogrammetry application can be used as “starter geome-
try” and as a basis to build upon. Remember, in the 3D world, size does not matter,
so you can create a model of something fairly small and make that 3D model look
very large when you mix it with other objects. You can challenge people’s assump-
tions about “what goes with what” in terms of size and function.
HERE ARE SOME IDEAS TO HELP SPUR YOUR CREATIVITY:
• Use photogrammetry to create a 3D model of a large seashell, and then
3D print that model as small earrings. Or do the opposite: 3D print a small
shell into a large one.
• Create a 3D model of a couple and 3D print them as a wedding cake topper.
• Give an artist 10 pounds of clay and tell them to sculpt an object. Tell them to be
as creative and detailed as they want. The resulting model can then be shrunk
down and 3D printed in a smaller size to be, for example, a jewelry pendant.
• Capture a 3D model of an apple tree, and then replace all of the apples with
3D models of sleeping cats (that you also captured with photogrammetry).
This would probably be an Internet sensation!
One disadvantage of photogrammetry is the low level of detail the process cap-
tures, as shown in Figure 13-4 of a rock. Even with a good DSLR camera the
average detail level of a 3D model that comes out of photogrammetry ranges from
5mm to 10mm. Essentially, the features that are smaller than 5mm will just not
show up on the resulting model. 5mm doesn’t seem like a lot, but if you look at the
transition area between someone’s nose and their cheek you’ll see it’s less than
Getting Started with 3D Printing 190
189 Chapter 13: Getting and Fixing 3D Models
INTERIOR_3DPrinting_v21.indd 189INTERIOR_3DPrinting_v21.indd 189 4/14/2021 3:01:06 PM4/14/2021 3:01:06 PM