The Data Layer order renders bottom to top. Therefore what is on the top layer will be done last.

Model layers also render bottom to top. Therefore the bottom layer will be rendered first, then the layer above it and do on until the top layer is rendered last.

However, the Models themselves render top to bottom based on how they are laid out in the Master View of the sequence. So the top model is rendered first, then the next lower model until the last model is reached.