Before:
{
  "layers": [
    {
      "name": "Scrolling Contents Layer",
      "bounds": [1200, 900],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV id='green-box' class='box green center composited'",
      "bounds": [150, 150],
      "contentsOpaque": true,
      "backgroundColor": "#008000",
      "transform": 2
    }
  ],
  "transforms": [
    {
      "id": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [162, 162, 0, 1]
      ]
    },
    {
      "id": 2,
      "parent": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [0, 0, -1.5, 1]
      ]
    }
  ]
}

After:
{
  "layers": [
    {
      "name": "Scrolling Contents Layer",
      "bounds": [1200, 900],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutNGBlockFlow (positioned) DIV id='green-box' class='box green center composited rotated-3d'",
      "bounds": [150, 150],
      "contentsOpaque": true,
      "backgroundColor": "#008000",
      "transform": 2
    },
    {
      "name": "Squashing Layer (first squashed layer: LayoutNGBlockFlow (positioned) DIV class='box top left')",
      "position": [-150, -150],
      "bounds": [450, 450],
      "transform": 1
    }
  ],
  "transforms": [
    {
      "id": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [162, 162, 0, 1]
      ]
    },
    {
      "id": 2,
      "parent": 1,
      "transform": [
        [0.707106781186548, 0.707106781186548, 0, 0],
        [-0.707106781186548, 0.707106781186548, 0, 0],
        [0, 0, 1, 0],
        [0, 0, -1.5, 1]
      ],
      "origin": [75, 75]
    }
  ]
}