Function bind_target 

pub(crate) fn bind_target(
    world: &World,
    context: RenderContext,
    pass: Entity,
    device: &Device,
    size: (u32, u32),
    samples: u32,
    with_depth: bool,
) -> Texture

Give pass an output-sized colour target, and its optional depth and multisample attachments, and return the colour texture.

The target is the library’s PersistentTarget, so the texture is registered in the graph in its own right — a screenshot can name it and read it back — and the view depends on it, which keeps it alive.