Shading problem

[1905265G4PRZ]

I was trying to create a metal surface with Arnold standard surface material and when I was Ctrl+Z-ing undoing and it became black in the persp view. Any ideas on why this happened and how to fix it? 

[dflood]

Just make another shader.

[mspeer · Accepted solution]

Hi!

In your persp view "Use All Lights" is enabled, but there are no lights in the scene.

So just create a light or set it back to "Use Default Lighting".