Hi,

If you have interest for more poweful stage3D features,
you can vote on this feature request to Adobe.
https://bugbase.adobe.com/index.cfm?event=bug&id=3651116

Some of current limitations of stage3D:
- AGAL can’t have over 200 instructions.
  So, you can’t have nicer shaders.
  For example, SSAO, you can’t have over 10 kernels. It’s ugly.
  In vertex shading, we can’t implement “shader noise” functions.

- Stage3D doesn’t support MRT.
  MRT bring to us more good performance
  when you use deferred rendering.

- Can’t use Float/Half-float texture format.