The green box appear angled out from the yellow box and embedded in it.

transform: translateZ(-100px) rotateY(45deg);
{
  "layers": [
    {
      "name": "Scrolling background of LayoutView #document",
      "bounds": [800, 600],
      "contentsOpaque": true,
      "backgroundColor": "#FFFFFF"
    },
    {
      "name": "LayoutBlockFlow (relative positioned) DIV id='container'",
      "bounds": [304, 304],
      "transform": 1
    },
    {
      "name": "LayoutBlockFlow (children-inline) DIV id='parent'",
      "bounds": [280, 280],
      "contentsOpaque": true,
      "backgroundColor": "#FFFF00",
      "transform": 4
    },
    {
      "name": "LayoutBlockFlow (positioned, children-inline) DIV",
      "bounds": [200, 200],
      "contentsOpaque": true,
      "backgroundColor": "#008000",
      "transform": 6
    }
  ],
  "transforms": [
    {
      "id": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [108, 73, 0, 1]
      ]
    },
    {
      "id": 2,
      "parent": 1,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, -0.002],
        [0, 0, 0, 1]
      ],
      "origin": [152, 152]
    },
    {
      "id": 3,
      "parent": 2,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [12, 12, 0, 1]
      ],
      "flattenInheritedTransform": false
    },
    {
      "id": 4,
      "parent": 3,
      "transform": [
        [0.766044443118978, -0.556670399226419, -0.32139380484327, 0],
        [0, 0.5, -0.866025403784439, 0],
        [0.642787609686539, 0.663413948168938, 0.383022221559489, 0],
        [0, 0, 0, 1]
      ],
      "origin": [140, 140],
      "flattenInheritedTransform": false,
      "renderingContext": 1
    },
    {
      "id": 5,
      "parent": 4,
      "transform": [
        [1, 0, 0, 0],
        [0, 1, 0, 0],
        [0, 0, 1, 0],
        [40, 40, 0, 1]
      ],
      "flattenInheritedTransform": false,
      "renderingContext": 1
    },
    {
      "id": 6,
      "parent": 5,
      "transform": [
        [0.766044443118978, 0, 0.642787609686539, 0],
        [0, 1, 0, 0],
        [-0.642787609686539, 0, 0.766044443118978, 0],
        [0, 0, 50, 1]
      ],
      "origin": [100, 100],
      "flattenInheritedTransform": false,
      "renderingContext": 1
    }
  ]
}