Unity camera camera about layer mask cullingmask settings

Camera There is .cullingMask attribute , Can be set by cullingMask Set the value of .

camera.cullingMask = 1<<X; // Render only the x layer
camera.cullingMask = (1 << x) + (1<<y) +(1<<z); // Render only the x、y、z layer
camera.cullingMask = -1; // Render all layers everything
camera.cullingMask = 0; // No layers are rendered nothing
camera.cullingMask |= (1 << x); // On the basis of the original, add x layer
camera.cullingMask &= ~(1 << x); // Subtract... From the original basis x layer
camera.cullingMask = ~(1 << x); // Render Division x All other layers except layer