Hi guys , I have a showreel to make but I am having alot of trouble rendering of this car for it. I am trying to use the "use background" shader for the shadows but its only giving me solid black in my render. The camera is set up with an image plane for the backplate. I have also tried using a blinn with primary visibillty turned off, but no luck there either . If anyone could help me out here that would be great . (it is HDR lighting) here are some pics of my problem: oh, I have also tried disabling the image plane and just using the use background for the ground but still no shadow in alpha channel..