Using a manually built model, the shadow is wrong

[bobo008]

Describe the bug Using a manually built model, the shadow is wrong.

I constructed a ground bound {{-10, 0, -15}, {10, 0, 15}} and a wall bound {{-0.5, 0, -10}, {0.5, 10, 10}} And set the bounding boxes correctly， add a directional light of { -1, -1 ,0 }，the shadow is wrong. At first I thought it was a problem with bounding boxes, but I still have this problem after setting the correct bounding boxes. Please let me know if I need to add any other information, thank you.

code： {

Entity ground = utils::EntityManager::get().create();
RenderableManager::Builder(1)
    .boundingBox({{-10, 0, -15}, {10, 0, 15}})
    .material(0, mat->getDefaultInstance())
    .geometry(0, RenderableManager::PrimitiveType::TRIANGLES, vb, ib)
    .culling(false)
    .receiveShadows(true)
    .castShadows(true)
    .build(*engine, ground);
scene->addEntity(ground);

Entity wall = utils::EntityManager::get().create();
RenderableManager::Builder(1)
    .boundingBox({{-0.5, 0, -10}, {0.5, 10, 10}})
    .material(0, mat->getDefaultInstance())
    .geometry(0, RenderableManager::PrimitiveType::TRIANGLES, vb, ib)
    .culling(false)
    .receiveShadows(true)
    .castShadows(true)
    .build(*engine, wall);
scene->addEntity(wall);

Entity sun = EntityManager::get().create();
LightManager::Builder(LightManager::Type::SUN)
    .color(Color::cct(6500.0f))
    .intensity(150000.0f)
    .castShadows(true)
    .direction({-1, -1, 0})
    .build(*engine, sun);
scene->addEntity(sun);

}

material {
     name : bakedColor,
     requires : [
        color,
        tangents
      ],
     shadingModel : lit
}
fragment {
    void material(inout MaterialInputs material) {
         prepareMaterial(material);
         material.baseColor = getColor();
     }
}

Screenshots https://github.com/google/filament/assets/26623108/4d09cee4-e47c-41a0-8b5c-edf0b73456c5

Smartphone (please complete the following information):

• Device: iphone14pro
• OS: iOS 16.6.1

[bobo008]

If I change the wall to a glb model, still have the same problem This doesn't look like a shadow, but as far as I can test bounding boxes affect its range

https://github.com/google/filament/assets/26623108/cfb892d2-121e-439b-b81e-81dcdcb1bf1f

[bobo008]

It looks like this is affected by bounding boxes and lighting direction https://github.com/google/filament/assets/26623108/833b6b7d-420c-441c-9902-532bb8624b7c

[poweifeng]

would you please also specify what filament version you're using? thanks.

[pixelflinger]

{ -1, -1 ,0 } is not a unit vector for the light direction.
Can you share the project?

[bobo008]

would you please also specify what filament version you're using? thanks.

version is 1.14.0