I cannot couch my disappointment about the current beta3 related to the BitmapData.setPixel method.
A simple test confirms, that the setPixels method is now 30% slower than before. After that test, I converted my 3dengine (beta2) to the current beta3 and the framerate drops from 76 to 55FPS.
So, simply put, I will abort the research about-perspective texture-mapping in AS3.
I know, there are many wonderfull things to do with AS3, but hey, it
was is still a dream…