Run multigrid with 2 grid: rectlinear and unstructed grid.

[SubgridFeatures]

Hello. Can someone tell or show the tutorial me, how run the model in multigrid mode with 2 grids: 1 - global rectlinear grid 2- local unstructed grid. Also I need there is the wind forcing in both grid, or only a global grid, with transfer waves via the open boundary unstructed grid. Is it real, or they can't connect anyway? Thanks