3D text, metals have vanished

This was working yesterday evening when I ran a couple of movies using metallic text. Nice stuff. Restarted the MacPro at the end of the day but now my metals neither render nor preview.

Simple metals appear only as solid, opaque black. Gold, aluminum, foil, brushed, copper, &c have suddenly vanished. Older projects that have these metals applied to 3D text now show up as opaque black, too.

I thought perhaps the interface just wasn't showing the metals but files will no longer render out showing metal surfaces. So, apparently it's not just the interface that is not picking up the metal procedurals.

The metals that have additional surface treatments such as rust, old steel, grunge metal, all of these will show up and render nicely.

I can add additional layers to shine metals but they never show up.

Clues? Started by trashing the Motion prefs, something I have never had to do. No change.

New information:
If I start with a blank project, I can apply 3D styles from the style menu such as Chrome and get metal results. I can even change the default silver to copper or gold.

but I cannot apply 3D styles to existing 3D text. Nor can I create new 3D text in an existing file or successfully apply a 3D style to it. just comes up solid black. Weird.

Nevermind.

Just out of curiosity, what did you find that corrected the issue?

Sorry not to get back to you sooner. I stopped dropping by the forum.
I just threw away the problem projects and recreated them. Easier than trying to debug the issue. Not sure what I'll do next time it happens.

Wish there was more Motion traffic here even if it's just to say, "Bummer, dude."