How are shared materials/textures handled between separate FBX assets in Horizon

Hi everyone,

I'm currently creating 3D assets for Horizon Worlds and using texture atlases to reduce draw calls. However, I’ve noticed that when I import multiple FBX files, even if they reference the same material/texture, it looks like Horizon Worlds duplicates the material for each asset.

Would it be better to group those assets into a single FBX that shares one material across the mesh? Or is there a way to ensure separate assets can reference the same material instance without generating duplicates?

Any insight on how Horizon handles this behind the scenes would be really appreciated!

Thanks in advance.