Only Emission shader is reflecting off glass, objects with Diffuse show up as black So even though I am not planning on using a Glass shader for the ground, I noticed that only objects that have Emission shaders attached are reflecting off the ground even though the Diffuse lit objects have the same level of brightness.

Basically everything that has a Diffuse shader shows up completely black.  I've outlined these areas in the image that I've attached.

It does seem somewhat logical that an emission shader would show up brighter in reflections but since the brightness is the same as the Diffuse lit objects it also seems very strange.

So is there a way to get the Diffuse lit objects to show up in reflections just as the Emission lit objects do?





Here's the .blend ~1.5MB http://www.pasteall.org/blend/30054

I've checked the Ray Visibility and everything is activated.
Probable Cause:

Your ground plane has Incorrect ray visibility settings In order to check if this is the issue, select your ground plane and diffuse objects. and make sure all the settings look like this:


If they don't, change them.

Also note that a Light path node could be the culprit as well.