Pbr GltfExtensionHandler: hashes to slashes

[ChristopherBiscardi]

Objective

The asset server doesn't handle paths with multiple # in them well, which leads to users trying to load the new-style standard material (post GltfMaterial/pbr inversion) like this:

let handle: Handle<StandardMaterial> = 
    asset_server.load("models/animated/Fox.glb#Material0#std");

and failing with

2026-02-13T18:39:46.765922Z ERROR bevy_asset::server: Could not find an asset loader matching: Loader Name: None; Asset Type: Some(TypeId(0x84f48d0a22ca9da8cd205decd68dcefa)); Extension: None; Path: Some("models/animated/Fox.glb#Material0#std");

Solution

On recommendation from @andriyDev , switching to use slashes fixes the pathing issue.

let handle: Handle<StandardMaterial> = 
    asset_server.load("models/animated/Fox.glb#Material0/std");

Testing

Used the gltf animated fox example to load a material as indicated above, and apply it to a 100x100x100 cube:

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The migration guide uses paths since so are the source of truth for the asset server, and there is currently no GltfAssetLabel for the new standard material handling. (This should be fixed also in a different PR).

[andriyDev]

I'd prefer we add a test that we can actually load this extra material, but I'll not block on that.

We should also change our asset loader stuff to ban these characters from asset labels, but that's a separate PR.

[Zeophlite]

Great catch, thankyou!