I have a simple scene with final gather turned ON, and the color of my environment is red. I also have a polygon with a ramp texture plugged to the color of its surface shader and few spheres and both the polygon and the little spheres are enveloped by a huge sphere (image A).
When I render with the default final gather FallOff values (so zero and zero) all is normal (image B). In the docs it says the Falloff Start is the distance after which the final gather contribution of objects switches to the environment color but when I render with Falloff Start set to 10, after 10 units from each point, the color switches to gray and not to red which is the color of my environment (image C)? Is that a bug? What is happening here?
On the other hand its says in the docs that the Falloff Stop is the distance after which objects will not be considered for final gathering but when I set Falloff Stop value to 10 (image D), after 10 units from each point, the color switches to a reddish value, shouldnt it switch to black since no final gathering is taking effect? And whats this bizarre reddish color, its not even the color of my environment.
[http://sor.typepad.com/.a/6a00d8350600cb53ef01a3fd1a9001970b-pi](http://sor.typepad.com/.a/6a00d8350600cb53ef01a3fd1a9001970b-pi)
[http://www.filefactory.com/file/38i4n3n1mt25/10_final_gather_falloff_issue.7z](http://www.filefactory.com/file/38i4n3n1mt25/10_final_gather_falloff_issue.7z)