All my windows and doors with windows went from transparent to solid white. I have open the material dialog for the glass and confirmed it is set to 100% tranparency with no effect.

[mikesbarn]

This one has me. Somewhere in along the process my Transparent Glass went to white. I copied the material to my personal folder open the file and made sure it was set for transparancy 

 

 

 

[SHCanada2]

went to white where? screenshot? the plan?

Edited April 4 by SHCanada2

[Rich_Winsor]

What type of camera view are you using?

For every type of rendering technique except

Physically Based and Glass House there is an

option to have Opaque Window Glass. Check

the Rendering Technique Options to see if that

option is checked.