Function bevy_pbr::prepare_view_depth_textures_for_volumetric_fog

pub fn prepare_view_depth_textures_for_volumetric_fog(
    view_targets: Query<'_, '_, &mut Camera3d, With<VolumetricFogSettings>>
)

A system that marks all view depth textures as readable in shaders.

The volumetric lighting pass needs to do this, and it doesn’t happen by default.