Emissive maps/glowing activation gate and girders

[Jolly Roger]

I am having trouble getting activation gates and girder blocks to glow. Someone had mentioned this had to do with a setting for "emissive maps" but I can't find this setting anywhere. Can someone tell me how to get this working?

 

[Crusade]

Under graphics settings, enable normal mapping (emissive maps are stored in the normal map data) and restart the game.