ID 470146 - Hydra Viewer doesn't display the model builder preview texture

Problem summary
The src input of the ModelBuilder is not displayed in the Hydra Viewer.

Customer reported version
Nuke 13.0v1

Customer reported platform
windows10

Steps to reproduce

1) Open NukeX.

2) Press the S key while mousing over the Viewer. This will bring up the Viewer properties panel.

3) In the Viewer properties, open the 3D tab and ensure the renderer setting is set to Hydra (Storm).

4) Create a ModelBuilder node in the Node Graph.

5) Create a CheckerBoard node and connect it to the src input of the ModelBuilder node.

6) Create a Camera node and connect it to the came input of the ModelBuilder node.

7) View the output of the ModelBuilder node.

8) If you go back to the Viewer properties, and open the 3D tab again, you can change the the renderer setting to Nuke to compare results.

Expected behaviour
The CheckerBoard from the src input should be displayed, like it is in the Nuke Viewer:

Actual behaviour

The src input of the ModelBuilder is not displayed in the Hydra Viewer.

Workaround
Unknown.

Reproduced by support

This bug has been reproduced in:
Nuke 13.0v1 - Windows 10 - Linux CentOS 7

Earliest version tested
Nuke 13.0v1 
- The Hydra Viewer was not available before this version