Render 3D Realview greyed out

[whidbey011]

When I try to use Render 3D Realview from the View menu it is greyed out and unavailable.  I am using TFP 16.0.C1.901.

Any advice?  Is there somewhere I need to turn it on?

[whidbey011]

Nevermind, I figured it out.  I was trying to render an isometric view, and, apparently rendering is only available for views generated by a camera.  My bad.