This is a database used in submited article "A well connected, locally-oriented and efficient multi-scale topology optimization strategy (EMTO)". It contains the cell's microstructures for different values of densities, orientations, and cubicities. Each column corresponds to a cell : the first three lines are the values of the three parameters (density, orientation, and cubicity). The next 10 000 lines are the micro-element densities (cells are made of 100*100 micro-elements). This database corresponds to cells with 4 transmission zones (2 per side).