Ogre loader cannot load multiple materials

The ogre mesh loader only loads the default material, which is the one with the same file name as the mesh itself. Even if the ogre exporter exports multiple materials correctly, jme3 will fail to load them.

Whilst debugging, I found out where I think the bug is :
DesktopAssetManager.java
public Spatial loadModel(String name){ return loadModel(new ModelKey(name)); }

Instead, this should work :

However, doing this creates a circular dependency in the gradle configuration, as it tries in the core project to use classes from the plugins project.

Anyway, the problem is that the core loader does not take into account custom ModelKeys from the plugins.

Here's a model exported from Blender using the ogre exporter. If you look into the mesh.xml file, you can see the materials are properly set.
crystaler.zip

Here are the log warnings :

Even though we convert the ogre mesh into an .j3o file, we need the materials to be properly loaded...

Start in DesktopAssetManager.java at loadModel(String), then inspect how custom ModelKeys from the plugins project are handled and why the core/plugins Gradle dependency becomes circular. Reproduce with the linked crystaler.zip and its mesh.xml, and verify that converting the Ogre mesh to .j3o loads all exported materials rather than only the default one.