Setting RenderLayers for the grids

[musjj]

I'm using bevy_ecs_ldtk and I'm trying to set the render layer (for offscreen camera purposes) for the spawned grids, but I'm having trouble making it work. I tried setting it in the bundle:

#[derive(Component, Default)]
pub struct Wall;

#[derive(Bundle, LdtkIntCell)]
pub struct WallBundle {
    wall: Wall,
    layer: RenderLayers,
}

impl Default for GroundBundle {
    fn default() -> Self {
        Self {
            wall: Wall,
            layer: RenderLayers::layer(1),
        }
    }
}

But it doesn't work. I also tried putting it alongside the world bundle:

commands.spawn((
    LdtkWorldBundle {
        ldtk_handle: asset_server.load("tilemap.ldtk"),
        ..default()
    },
    RenderLayers::layer(1),
));

But it's also not working. Is there a proper way of doing this?

[musjj]

Figured out a solution:

fn add_layer(
    mut commands: Commands,
    wall_query: Query<&Parent, Added<Wall>>,
    parent_query: Query<Entity, (With<Parent>, Without<Wall>)>,
) {
    for parent in ground_query.iter() {
        if let Ok(entity) = parent_query.get(parent.get()) {
            commands.entity(entity).insert(RenderLayers::layer(1));
        }
    }
}

But this doesn't affect the background. I'm not sure how to target the background entity directly, so I'm currently using this hacky background:

fn fix_background(
    mut commands: Commands,
    query: Query<Entity, (With<Sprite>, Without<...>)>,
) {
    for sprite in query.iter() {
        commands.entity(sprite).insert(RenderLayers::layer(1));
    }
}

I had to litter it with Without<...> so that it doesn't affect any unwanted sprites. Is there a better way of doing this?