ID 488817 - Project3D always projects on both the front and back when using the Hydra Viewer

Problem summary
Project3D always projects on both the front and back when using the Hydra Viewer.

Customer reported version
Nuke 13.1v1

Customer reported platform
Windows 10

Steps to reproduce

1) Open Nuke.

2) Press the S key over the Viewer and open the 3D tab. Ensure the renderer setting is set to Hydra (Storm).

3) Paste the following script into the Node Graph and connect a Viewer to the Sphere node:

set cut_paste_input [stack 0]version 13.1 v1push $cut_paste_inputCamera3 { translate {0 0 2.299999952} name Camera1 selected true xpos -187 ypos -197}CheckerBoard2 { inputs 0 name CheckerBoard1 selected true xpos -40 ypos -284}Project3D2 { inputs 2 name Project3D1 selected true xpos -40 ypos -167}Sphere { name Sphere1 selected true xpos -40 ypos -93}

4) Open the Project3D's Properties panel, and change the project on knob to front or back.

RESULT: The CheckerBoard is always projected on the front and back of the sphere.

5) If you then change the renderer to Nuke (press the S key over the Viewer > 3D tab), the project on knob then works as expected.

Expected behaviour
When using the Hydra Viewer, the Project3D node should only project on to the specified faces.

Actual behaviour
Project3D always projects on both the front and back when using the Hydra Viewer.

Workaround
You can workaround this issue by using the legacy Nuke 3D Viewer, which you can change by doing the following: 

Press the S key over the Viewer > 3D tab > change the renderer setting to Nuke

Reproduced by support

This bug has been reproduced in:
Nuke 13.1v1 - Windows 10 - Linux CentOS 7 - macOS 10.15 (Catalina)

Nuke 13.0v1 - Windows 10 - Linux CentOS 7

Earliest version tested
Nuke 13.1v1 - macOS 10.15 (Catalina)

Nuke 13.0v1 - Windows 10 - Linux CentOS 7

- The Hydra 3D Viewport did not exist before this version