ID Fuse quickly and efficiently merges material IDs on complex models. The plugin combines textures from multiple material IDs into a single texture atlas and automatically remaps the UVs to match it.

This solution can significantly improve rendering performance while saving you dozens of hours of manual work. It also features a fully automatic mode that makes the entire process so fast it can surprise even experienced technical artists.

A detailed overview of the plugin's features is available via the link below.

https://teres4enko.blogspot.com/p/id-fuse-ue-plugin.html