I have created a new project using the Local Scene project template in ArcGIS Pro 1.1. My 2D layers which I added from an existing file geodatabase are not visible in the scene. They are turned on in my Contents pane and are set to ground. If I move the layers to 3D they appear. I was not having this issue with the ArcGIS 1.1 beta version I had been using.
If I add my local DEM as an elevation surface in addition to the default world elevation used by ArcGIS Pro, the 2D layers become visible. The minute I remove my local DEM, they disappear again. I have set the elevation surface to no color and allowed navigation below surface. The 2D layers will not show up.