Hi Nathan, beautiful model 
My main concern is how OpenGL lacks spark in the reflections:
I made a new scene to test it better.
Here is a test with Glass, converted to Custom and a new PBR + metal:
PS! See how different the materials looks in OpenGL.
OpenGL:
Raytraced does a good job though.
Raytraced:
Here is the file:
Glass material test.zip (5.7 MB)
OT: I tried putting the geometry in a block, with materials from parent, but then OpenGL messed up and didn’t show the backdrop geometry through it.
(All this is V7)