In this part of the story we have various miniature set pieces built to depict the Island home of UMA used across a number of episodes of Ultraman Towards the Future AKA Ultraman Great, Sydney Australia 1989.
This was the cliff miniature used to show the Hummer flying vehicles exiting their launch tunnel. Made by Tony Lees.
A small scale model was built for the wide shots of the island. The sea is some crinkled up clear plastic. In the end I think this was replaced by a digital video composite using a still photo of the real sea in the episodes which frankly in my opinion looked a lot worse.
Pyro by Alan Maxwell and Judy Dabbs.