I'm having hard time getting alpha in images to work correctly.
For flash target it works well, but the pre-multiplied alpha seems to be wrong for Html5:
I was able to get the Html5 to work properly by modifying the Texture.hx fromBitmapData() code to pass false for premultipliedAlpha when calling Texture.empty(). However this is not a good solution, I guess.
I also noticed that openfl.display3D.textures.Texture has a conditional uploadFromBitmapData implementation for non-flash targets - perhaps the problem is there.
Any Ideas on that?