1. Multiple 3D layers in one Photoshop document

2. Photoshop document with one 3D layer A Photoshop document with one 3D layer

3. Duplicating the original 3D layer

4. Let's accept the name suggested for the new layer

5. A document with two 3D layers Now the layers panel shows we have two layers –although we can see only one cone in the document –this is because both layers are identical

6. Some key parts of a 3D layer Each 3D layer has many different parts For now, however, it is important to note that every 3D layer has its own –3D object or, as we will see later, a set of 3D objects –camera –ground plane

7. A document with two 3D layers Turn on the 3D panel

8. A document with two 3D layers Since the upper layer is selected in the layers panel, –the 3D panel contains information about this layer

9. A document with two 3D layers Click on the ground plane toggle in the 3D panel to...

10. A document with two 3D layers... to turn on the ground plane for the upper layer

11. A document with two 3D layers In the layers panel, select the lower layer In the 3D panel, toggle the ground plane switch for the lower layer to...

12. A document with two 3D layers... turn on the ground plane for the lower layer Both ground planes are now turned on But we can see only one ground plane in the Photoshop document because the two layers are identical

13. Let's see what happens when... Let's see what happens when –in a document with more than one 3D layer –we move the camera for one layer

14. Moving one camera in a document with two 3D layers Select the camera tool set Since the lower layer is selected, the camera tools will manipulate the camera for the lower layer

15. Moving one camera in a document with two 3D layers When we alter the camera for the lower layer –we see both ground planes

16. Moving one camera in a document with two 3D layers The Photoshop document shows the images seen in both cameras Each camera is looking at its own cone and its own ground plane Both ground planes are in the same place in XYZ space Both cones are still in the same place in XYZ space –because we have not moved either 3D object But two cameras see different images –because we have moved one camera and not the other

17. Moving one camera in a document with two 3D layers If we turned off both ground planes, –the contents of the Photoshop document would make it appear that one cone has moved But neither cone has moved

18. Moving one camera in a document with two 3D layers The situation is exactly the same as if, –instead of having two cones –we had just one cone –and photographed it with two cameras from two different angles –and then superimposed both photographs

19. Exercise Tackle Exercise 20