Anisotropy example has gaps and continuity errors

[hukasu]

Bevy version

4db18d8

[Optional] Relevant system information

2024-10-30T22:18:58.292727Z  INFO bevy_diagnostic::system_information_diagnostics_plugin::internal: SystemInfo { os: "Linux 24.05 NixOS", kernel: "6.6.51", cpu: "Intel(R) Core(TM) i7-14700KF", core_count: "20", memory: "31.2 GiB" }
DRM kernel driver 'nvidia-drm' in use. NVK requires nouveau.
2024-10-30T22:18:58.345559Z ERROR wgpu_hal::vulkan::instance: GENERAL [../src/nouveau/vulkan/nvk_physical_device.c:935 (0x0)]
        VK_ERROR_INCOMPATIBLE_DRIVER    
2024-10-30T22:18:58.345590Z ERROR wgpu_hal::vulkan::instance:   objects: (type: INSTANCE, hndl: 0x557e6959faf0, name: ?)    
2024-10-30T22:18:58.366831Z  INFO bevy_render::renderer: AdapterInfo { name: "NVIDIA GeForce RTX 4060 Ti", vendor: 4318, device: 10243, device_type: DiscreteGpu, driver: "NVIDIA", driver_info: "550.78", backend: Vulkan }

What you did

cargo run --example anisotropy --features="jpeg pbr_anisotropy_texture wayland"

What went wrong

There are gaps and continuity errors on the light reflected from the lamp.

Additional information

[BenjaminBrienen]

Test after #16111

[hukasu]

same thing after ca34e97

[hukasu]

That PR is related to meshlets though, changes nothing on normal rendering

[hukasu]

I added a Sphere to the scene to see how it looks and here is them

Anisotropy off

Anisotropy on (rotation: 0.2, strength: 1.0)

commands.spawn((
    Mesh3d(asset_server.add(Sphere::new(0.1).into())),
    MeshMaterial3d(asset_server.add(StandardMaterial {
        base_color: palettes::tailwind::GRAY_300.into(),
        anisotropy_rotation: 0.5,
        anisotropy_strength: 1.,

        ..Default::default()
    })),
    VisibleWhen(2),
    Visibility::Hidden,
));

are this anisotropy levels invalid? the VisibleWhen is something i made to toggle between the barn lamp and the sphere

[hukasu]

welp, forgot to generate the tangents, here are Anisotropy on but with tangents

[hukasu]

video

Screencast_20250204_071944.webm

[hukasu]

with wireframe

[hukasu]

No seams on ConicalFrustum, and Cylinder

Capsule has seams on the top and bottom caps, on the backside

Torus has a seam on the top

Couldn't find seams on Cone, but i don't think they are supposed to have 2 streaks

Sphere (ico(16))

Sphere (ico(32))

Sphere (uv(32, 18))