There are a few key steps to obtaining a good 3D scan:
1. Start in the center of the customer's face, and scan directly up and down, to ensure the patient's nose is symmetrically captured.
2. Get as close to the customer as possible.
3. Ensure good lighting (daylight is preferable) with minimal shadows.
4. Go slowly, especially when you see a black bar on the screen, asking you to pause.
Here is a video that demonstrates how to capture a 3D scan: https://youtu.be/PY7AiG2jqlM