define('DISALLOW_FILE_EDIT', true); Backstage2D – unFocus Projects – Kevin Newman and Ken Newman


Backstage2D is a 2D graphics engine for Flash and AIR in Actionscript 3.0 accelerated by the GPU on Stage3D, with an emphasis on mobile. I like to think of it as the GPU augmented display list.

Fork Backstage2D on GitHub!


  • A clean, easy to understand, small API, with as few gotchas as I could work out.
  • Starts from familiar Flash display list assets, like vector based Sprites and MovieClips (with some caveats – they become static for example), so you get all the beautiful Flash rendering you remember.
  • AS3 Signals (through SignalsLite) based event model.
  • Automatic sprite sheet creation and management. No one likes making sprite sheets manually, but to make things run great on a GPU (especially mobile GPUs) you have to use them. With Backstage2D you’ll never have manually make sprite sheets again!
  • The license is MIT so do what you want with it.

Planned Features (not done yet)

  • Resolution independent measurement units (inches, metric, or simply a normalized pixel unit). This will allow for content intended to be 1 inch to actually be 1 inch on all screens, and with appropriate assets (vector art, or high res bitmaps) clean screen fitted content.
  • Framerate independent animations. We’ve always wanted them, and now we can have them! MovieClips with independent frame rates.
  • Dynamic or streaming MovieClips – CPU driven animations for when you want to get dynamic.


  • Imagination.

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