Autodesk Revit Architecture

[#1]

For no apparent reason the Render Button at the bottom of the view frame has disappeared. With RayTrace I just get a black screen. It was all working fine then suddenly the problem occurred.

There doesn't seem to be anything wrong with the PC - I can render in MAX Design as normal.

Any ideas would be appreciated ...

[#2]

It's something about textures isn't it?

There is no difference between setting the view to Shaded and Realistic ...

[#3]

I can't edit Materials either ....

[#4]

I tried a 'Repair' from the Installation - that said repair was successful - but if hasn't solved the problem ...

[#5]

Not sure if this is what your talking about, but I randomly lost my Render to cloud button on the ribobn.  see attached image.  Ray trace working fine though (not that I ever use it)... I'm logged in to subscription center and have rebooted multiple times.