DroidSpray for Android is like virtual graffiti. Using the camera built into your phone you will see your artistic musings on top of your surroundings. If placed well, it might even appear to be real graffiti. DroidSpray for Android is the first augmented reality application for Android that lets you directly interact with 3D models: create semi-transparent walls in arbitrary 3-dimensional orientation, move them around, and spray paint on them. The basic element in DroidSpray is the 'wall'. This is the canvas for your spray paint.