ID 407950 - Normal, bumps and displacement maps are producing NaNs in renders.

Problem summary
Normal, bumps and displacement maps are producing NaNs in renders.

Customer reported version
Modo 13.1v1

Customer reported platform
Windows 7

Steps to reproduce

1) Download and open the attached scene file.

2) Press the F9 key to render the scene.

3) Notice how NaNs are present within the rendered result.

Expected behaviour

The render shouldn't show NaNs.

Actual behaviour
NaNs are being rendered.

Workaround
Unknown.

Reproduced by support

This bug has been reproduced in:
13.1v1 - Windows 10 -regression

Unable to reproduce bug in:
13.0v1 - Windows 10

Earliest version tested

13.0v1 - This issue doesn't appear in this version and has regressed