How to display two scenes in one screen?

I have 2 scenes and want to split screen in 2 parts. Each part displays own scene and handles mouse clicks.
76571-2scn.png

I try to use “add scene additive”, but it just adds own object tree to active scene. I need separate scenes in each part and be able to determine mouse events in both scenes.

Is the way to implement that in Unity?

Use Open scene additive

In the inspector of the camera (3d scene)

Go to Camera > Viewport Rect

use these settings
76585-3d-viewport-rect.png

In the inspector of the camera (2d scene)

Go to Camera > Viewport Rect

use these settings
76586-2d-viewport-rect.png

@OsmiousH
@xotonic

I Found out the error

In the layer manager add new layers 2d and 3d

*** In the Camera Settings of 2d camera***

  1. Find culling mask
  2. In the culling settings
  3. Remove 3d

Do the reverse in the 3d camera

Now in the objects you want to set 2d add 2d layer and the opposite in 3d