I found in the Poser 11 manual file:-

Unsupported in SuperFly: • Ambient occlusion on lights • Smooth Polygons • Custom output 1, 2 and 3 • Specular and Diffuse light shaders • Background node Diffuse_Color, Specular_ Color, and Bump input • Depth Cue • Atmosphere Strength parameter on lights • Quality and ray bias parameters on ray traced nodes • “Opaque in Shadow” checkbox on Hair node • Shadow catchers • Toon outlines

But in Superfly (or in Firefly), how can I get the result in outdoor scenes, of edges of shadows being a bit blurred because the sun is a finite size (half a degree of angle, as seen from Earth) and not a point light source?