Mapillary Photos Mode not upgrading in MC
Author: MottomiCreated Sep 15, 2026Updated Sep 15, 2026
Labelsbug
Describe the bug When generating a world with the Mapillary Photos facade mode, the world does not get upgraded in the latest version of Minecraft (26.3). Throws a "Failed to upgrade the world; The world folder seems to already contain some upgraded files." error.
Used bbox area One example is 39.361039,-74.418542,39.364356,-74.412811 but happens anywhere.
Arnis and Minecraft version Windows Java Minecraft 26.3 Arnis 3.2.0
Screenshots
Source: louis-e/arnis