Harmonic Armature Grid. The Harmonic Armature grid is a popular alternative to the Dynamic Symmetry grid. It can be used for any proportion canvas. It's an extension of the rule of thirds (ROT) as the intersections of the main diagonals with the diagonals from the corners to the midpoint on the edges are at the ROT sweet spots. For more information visit my blog. I am currently studying and comparing the benefits of each grid.
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