I used to have an away 3D based model viewer in a flex based project. It was shown in a popup, and I masked the entire application (including the popup) to be able to see the 3D view. This hack is needed, because stage3D is rendered behind the display tree.

Now.. I’m refactoring the application, and I’m no longer using a popup. The view is added in a UIComponent. For some reason the mouse event no longer come trough. I can’t seem to figure out why. Anyone experienced something like this before?

Try it:
component.mouseEnabled = false;

I don’t understand… I’m no longer receiving mouse events… and you say the solution is to turn OFF mouse events?

I think Flex2D context is overlay Stage3D context and your app can’t receive any event. I solved the same problem with FlashGUI (not Flex) + Away3D.
See my demo: http://snzflash.com/planner/
Here is the flash2d gradient fill: http://shot.qip.ru/00eBeQ-311BE1KkHO/