A browser 3D open-world game built from real Osaka map data, made with Claude Fable 5.2(qiita.com)

- This is a 3D game you can launch right in a web browser to walk around Osaka streets, drive cars and do missions. It is VELA BAY, made by the author 7mpy with Claude Fable 5.2, set around Tsutenkaku and Abeno Harukas. - The area of about 1,557m x 1,386m was built from 3,699 road segments and 4,519 buildings from OpenStreetMap, plus elevation data and aerial photos from the Geospatial Information Authority of Japan. - Without a physics engine, collisions are handled by treating buildings as polygons and vehicles and people as circles. Vehicle AI follows the road data and drives on the left. - According to the author, it was not generated all at once. Instead it was built in units such as city, vehicles, police and missions, repeating the process of checking that each worked.