I’ve figured out how to use it in BP. I’ve set up a Call in Editor function to update the subdivision count based on a public variable. There’s a few different options for “Mesh Modification Type” in the “Start Modification” node which I’m not too sure what the difference is, but I just left it at the default. I also haven’t tested if this works at run-time or if it’s only meant for in-editor stuff.
https://cdn.discordapp.com/attachments/221796616653373441/498613845812838410/unknown.png