Help with sub dividing a sandbox grid


Some time ago I needed to create some fairly specific terrain in sketch up. By searching the web and looking at various tutorials I worked out a way of sub-dividing an area of the mesh into smaller rectangles which gave me more detail when using the smoove tool. The bit I’m talking about is at the bottom of the pic below.


Fast forward several months and I need to edit my terrain but can’t for the life of me remember how I sub-divided the grid. All I know is that it wasn’t using the ‘add detail’ tool. Any help would be appreciated.

If you want a finer mesh in both directions, SplitFace would do it…

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And (since Thomas liked my post :wink: ) an attempt with QuadFaceTools, which preserve the quads structure and can be subdivided further with SubD ($) e.g. …