Recap supports the following point cloud formats. If you have these types of files, import them into Recap and then you can export the file to .rcs/.rcp format for practice...
Rcp files are very large (many GBs) and most often proprietary. I don't know of any open source .rcp files, unfortunately. You may be able to find a reseller that does scanning to see if they may have something for demonstration.
There's a whole project (called 'AutodeskReCapSampleProject') that installs with the application. If you don't see it on your home screen when you start the app, you can find it at C:\ProgramData\Autodesk\Autodesk ReCap 360\Sample.
