I am having a similar problem to Displaying ArcScene polygon extrusion edges?
When I extrude polygons in ArcScene 10.2.1, the polygons rise to the specified height, but the outlines of each feature are not displayed (Mapping Problem- top image). In particular, I'd like to see the outlines for each country, regardless of their extrusion height.
I've tried the suggestions listed in the aforementioned post, but do not get the desired effect. I even tried the user's solution to use the Feature to 3D by Attribute tool on the polygon layer. I then added that output layer to Arcscene without any extrusion, symbolized with no fill and a black outline, but again fail (Mapping Problem- bottom image).
I'm very new to ArcScene (but well-versed in ArcMap).