About reflections and groups
In addition to choosing reflection settings for individual layers, you can adjust settings for an entire group. Reflection settings (in the Properties Inspector) for a group override the settings of individual layers in the group. For example, if a layer in a group is not set to receive reflections, turning that setting on for the whole group forces the individual layer to receive them. Turning off the setting for the group allows the layer’s settings to act as expected.
Cast Reflection settings (in the Properties Inspector) work differently. If the group is set to cast reflections, individual objects’ reflections can still be turned off (or set to Reflection Only). However, if the group is set to not cast reflections at all, individual objects never cast a reflection, regardless of their setting.
For more information about the Reflection settings and Cast Reflection settings in the Properties Inspector, see Reflection controls.