It looks like my skylight is what is causing it to look like this. When I disable it the glass doesn’t look opaque. And for a better test I checked Lower Hemisphere is Black and that gives this.
Here are my skylight settings that produce the opaque glass. This was working in 4.11. So something needs to be fixed here.
If there is a difference now in the skylight from what it was in 4.11 vs 4.12.5 please post that as a new question so it can be assigned and addressed. Having multiple issues in a single thread is not ideal. The original issue that was reported here has already been resolved.
Thank you!
Tim
The solution now is:
delete skylight in scene
