When i create a plane it does not show up in the game view
I couldn’t see my plane, even though the camera wasn’t edge on and I was viewing it from the right angle. I went into the camera’s Inspector view and changed the projection from orthographic to perspective. Then it showed up 
A couple of possibilities:
- You are viewing the plane edge on, so that it is not visible from the camera angle.
- Planes are one sided, so you are viewing it from the wrong side. If you are trying to make the plane vertical, try rotating it -90 on the x axis.
If the issue is vertical orientation, may also want to take a look at the CreatePlane script as an alternate to the built-in planes.
I have had a similar problem. The solution suggested by @KBurchfiel to switch the camera to perspective worked in that it showed the plane, but my game is 2D and so it meant that the view was all wrong. I then discovered that the plane wasn’t allocated to a layer that was being rendered in orthographic mode. If I added it to a layer and then selected this layer in the “culling mask” drop-down list it was displayed in the game view with the camera in orthographic mode.
Assign a material to the plane
and switch Shader option of material.
I’ve changed the Shader option to “Sprite/Default”
and it shows up in the Game view.
(I didn’t try every options of Shaders. there might be another options works)