split screen

How can I use my camera’s output for 1/2 of screen and use my pc for the other 1/2 of the screen on a monitor?

Look at the bottom of this page, there are precise instructions on how to do this.


And then there things on the unity store you can use to output the camera on your computer to a camera in the game.

Use the Normalized Viewport Rectangle option in your camera and define a certain portion of the screen (i.e. 1/2 of the screen) that the current camera view will be drawn upon. Then you should add a guiTexture and overlay it on the other half. Use built-in WebCamTexture and assign it to the gui texture.