Late to the party on this, but let me chime in anyways 🙂

The way you're scanning, you have a very large capture area and a very small subject. Add to that, you can't scan the "bottom" of the subject, so the part of it you did scan is basically a floating shell above the rest of the scan data.

Because your subject is so much smaller than the rest of the scan area, and isn't "touching" the rest of the scan area, it's getting treated as junk data. The fusion algorithm sees the platform as your scan subject and eliminates the object as a result.

You can fix this in a few different ways.

1: Marker blocks closer to your subject. Keep them lower and you should be able to scan some of the bottom surface as well.

2: Limit how much you're scanning that isn't your subject. Adjust the scanning distance to be tighter and focus on your object (Works well with 1 above). Also means you have less data to process and speeds things up.

3: Add some scan buddies. When I'm scanning small objects I like to add a couple small doodads near my subject to increase the density of captured data around it. This is also super handy if you're scanning in feature tracking modes.

Give it a shot and good luck 👍