i want to set the key frame texture to the transparentImage.png. So when my image target is tracked only the play icon is visible before the trackable image, but when the video is playing, the texture before the video is not transparent anymore (its a half transparent / almost grey texture). I use the legacy shader / transparent / diffuse - shader. When i use no texture for the key frame, the image target is overlayed by a full white texture and the play icon at the beginning, but everything else works fine. I use Unity 5.3.0f4 and developing for android devices.