if there are no brushes in source 2, is it still possible to make terrain with carving?
I think the question you mean to ask is, how can I produce result X in Source 2 without tool Y?
If you’ve seen the workshop tools for Source 2, they are huuuge improvements from Source 1’s hammer editor. What is it exactly you’re trying to achieve?
He wants to create terrain by creating brushes and carving them out of the terrain, like this: https://www.youtube.com/watch?v=xh9Kr2iO4XI
This must be a troll