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Achieve a completely transparent app background in Android

Android has a unique advantage, over most other operating systems, in that it's display server permits an app to have a transparent background.

On the Android SDK side, it's quite simple to do (instructions here: http://stackoverflow.com/questions/2176922/how-to-create-transparent-activity-in-android )

I wonder what it would take, from the Unreal Engine side of things, to get a completely transparent app in UE4 (whilst allowing components in the scene to still be rendered)

A bit of background behind my interest of this: I'm trying to build an app where you would have a virtual character overlaid over the rest of the OS.

I would imagine it would involve playing with the OpenGL canvas and setting the transparency of this accordingly.

Any help or pointers to resources will be greatly appreciated and up-voted :)

Thanks, James

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asked Feb 15 '15 at 05:33 PM in C++ Programming

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