dense cloud classification of ground/non ground points

[saellen]

Hello!
I'm working with the tool to classify ground/non ground points to get a DTM/DSM. My setting is tundra vegetation so I'd like to see if i can estimate canopy height and know the changes are on a very small scale. When following this tutorial (https://www.agisoft.com/pdf/PS_1.1%20-Tutorial%20(IL)%20-%20Classification%20and%20DTM.pdf) I'm not getting anything to show up. I'm wondering if the parameters I'm inputting for angle, distance, cell size need to be tweaked. Any ideas on the best results given my setting? Thanks!

[Costas]

After classification did you change the view so you can see the classification? (pic1)

You can also "filter by class" (pic2) to see only the classes you need.