---
root:
  items:
    - type: reference-frame
      transform-style: flat
      items:
        - type: reference-frame
          perspective: 1000
          transform-style: flat
          items:
            - type: reference-frame
              transform: rotate-z(-45) rotate-x(-75)
              bounds: 50 0 100 100
              transform-style: flat
              items:
                - type: rect
                  bounds: 0 0 100 100
                  color: green
