ID 392312 - Black spots when rendering.

Problem summary

When rendering this scene in Modo 13.0v1 you get black spots on the Final Color Output, Reflection Shading Output and Transparent Shading Output. The Optix output contains larger spots, however, if you turn transparency off these spots don't appear.

Modo 12.x renders contain a far larger amount of these black spots.

This issue doesn't seem to appear on OSX versions of Modo.

Customer reported version
modo.13.0v1

Customer reported platform
windows10

Steps to reproduce

1) Download and open the attached scene in Modo.

2) Press F9 to render and see the black spots in both the Final Color Output and the Optix output.

3) Go to the Shader Tree and select the Sauce Juice group, then select the Material inside. 

4) In the material's properties go to the Material Trans and set the Transparent Amount to 0%.

5) Rerender and notice the black spots no longer appear in Modo 13.0v1 or there are far less in Modo 12.x.

Expected behaviour
The render not to contain any black dots.

Actual behaviour
The renders contain black dots when there are transparent materials.

Workaround
Unknown.

Reproduced by support

This bug has been reproduced in:

Modo 13.0v1 - Windows 10 - Centos 7

Modo 12.2v2 - Windows 10

Modo 12.1v2 - Windows 10

Modo 12.0v1 - Windows 10 - Centos 7- regression 

Unable to reproduce bug in:

Modo 13.0v1 - MacOS 10.13

Modo 12.0v1 - MacOS 10.13

Modo 11.2v3 - Windows 10 - Centos 7

Earliest version tested
Modo 11.2v3 - This issue no longer appears in this version and has regressed.