Mountains can be seen from other mountains, but if there is high ground in between, the distant mountain may be out of sight. Also, even major peaks blend into the skyline or just below it. For example, Jagungal is visible from Tabletop not too far away to the north-east. As far as I'm aware, due to high ground between the two mountains Round Mountain is not visible from Tabletop. On a clear day in winter the Main Range can be seen from Mount Bogong, but Kosciuszko, Lee, Rams Heads are just bumps. Tate at the back may be hidden by the high ground from there to Rams Heads. Further, haze often obscures mountains. One evening camped on Bogong there was just a blur towards Kosciuszko, but at dawn the air was clear and Jagungal stood out, 120 kilometres away from memory.
Is there a way to determine if there's a line of sight from one peak to another?