GVRCamera rightCamera = mainCameraRig.getRightCamera(); leftCamera.setBackgroundColorR(0.2f); leftCamera.setBackgroundColorG(0.2f); leftCamera.setBackgroundColorB(0.2f); leftCamera.setBackgroundColorA(1.0f); rightCamera.setBackgroundColorR(0.2f); rightCamera.setBackgroundColorG(0.2f); rightCamera.setBackgroundColorB(0.2f);