Shaded View Colour disappears

Hello

Rhino 6 Evaluation (long time Rhino 4 and 5 user)

The 3dm file loads in grey scale, I click on the object and the material colour appears, then I pan, zoom or rotate the object and the colour reverts to grey scale. Any ideas how to fix?

Cheers

Ian

Have you upgraded your graphics drivers lately? That’s going to be the first question asked.