Nvidia Attic Standin rendering different than Stage

**Describe the bug**
There are small differences between standin and stage rendering. Not sure if I should post it here but there you go.
Check the shadows, and some shading issues in the gif. Stage rendering correctly, Standin is missing shadows and shading.

**Steps to reproduce**
Steps to reproduce the behavior:
1. Load Standin, (turn off the stage lights), render
2. Delete standin
3. Load stage and render (turn off the stage lights)

**Expected behavior**
No differences

**Attachments**


**Specs (if applicable):**
- Windows 10
- MayaPR114

No source file, test, or entry point is identified. First reproduce the comparison on Windows 10 with MayaPR114 by rendering Nvidia Attic with Standin and Stage while stage lights are off, then inspect the shadow and shading differences. Done means both renderings match; the issue provides no guidance for locating the rendering code.

Written by the indexing model from the issue text.