This is an overview of how I created the diamond grid for the viking helmet...this might work for furniture as well..or maybe not :P    Copy the base helmet mesh into a new layer, select the points you want and Chamfer  them until you like the size of the squares.  Select the newly created squares, give them a new surface name and subdivide  the polygons using Faceted method . This will give us the edges we need later on.  Bevel  the N-gons just a little bit and then collapse  the polygons.  Select all the center edges that form a cross and bevel the edges  until they roughly match the size of the squares.  Merge Points , change the distance setting until you delete all the extra polygons and then delete all the 2-point vertices.  Select the triangles with the surface name you applied earlier on and merge them into quads.  Select all the quads (4-point polygons) and copy into a new layer.    If you're not concerned with the heavy polygon count, you can subdivide the polygons ( F...