Within an Assembly with glass the glass color will Spontaneously change to a dark opaque gray from a transparent blue
Is this a question or statement???
It is a question. Why does this happen?
It's possible that the Part's appearance was overridden in the Assembly, but I'd say it's more likely a graphics issue.
Check these settings
Thanks for the tip John. However, I just went to my backup files and continued with the assembly.
Retrieving data ...