Materials with alpha channel disappear in any viewmode but rendered

Hi,
I’m having some troubles with materials with alpha channel disappearing in any viewmode but rendered.
Latest wip.
RM

Do the materials display at any point and then disappear or are they always gone?

Hi Steve,
I’ve attached the plane surface that is doing this. Maybe it’s just a setting I missed? However shouldn’t a surface show up in wireframe it doesn’t here?
I’ve run into this in all the wips as well is that on occasion no objects show in the viewport I have to select them manually with a window select then Rhino reports a surface selected.
In the attached I can only see the surface in Rendered mode. It has an alpha channel texture or setting maybe I have that wrong.
Thanks for taking a look sorry I didn’t get back to you sooner.
RM
dropTSrf.3dm (179.7 KB)