ID 498357 - When exporting to USDZ the emissive and clear coat textures don't seem to be written correctly.

Problem summary
When exporting to USDZ the emissive and clear coat textures don't seem to be written correctly.

Customer reported version
modo.15.2v1

Customer reported platform
mac.11

Steps to reproduce

1) Launch Modo.

2) Create a mesh primitive,

3) Add material.

4) Go to the Shader Tree and select Add Layer.

5) Add one image as Diffuse Color.

6) Add Texture > Checker as clearcoat amount.

7) Export as USDZ.

8) Close scene without saving.

9) Go to File > Import and import the exported USDZ.

10) When scene loads go to the Shader Tree and expand the imported material.

11) Note that the Check clearcoat amount did not import.

Expected behaviour
All material content should import.

Actual behaviour
Some material content is lost.

Workaround
Unknown. 

Reproduced by support
This bug has been reproduced in:
15.2v1 - Mac OS X 10.14, Windows 10
15.1v1 - Mac OS X 10.14, Windows 10
15.0v1 - Mac OS X 10.14, Windows 10
14.2v1 - Mac OS X 10.14, Windows 10


Unable to reproduce bug in:
14.2v1 - Mac OS X 10.14, Windows 10

Earliest version tested
14.2v1 - This feature did not exist before this version