Apply transparency depending on camera

Hi, I have 2 cameras, split screen. I want on the first camera, player 1 to be semi transparent and player 2 fully visible, and the opposite on the player 2 camera, how would I go about this?

edit: Solved. I created a script with the OnPreRender and OnPostRender functions. In PreRender I set the transparency of the player, and on PostRender I reset it.