The alter never as a shrine on it to start with. You need to activate one of the goat-horn lamps on either side of the table. The lamps enable you to toggle through each of the shrines until you find the one associated with the Aedra (or, in one case, Daedra) you prefer to devote to. The alter only ever displays one shrine at a time. You can even cycle back around to having a blank alter if you don't want a shrine and prefer to use the table to manually display some other object you wish to venerate or just display in prominance. Maybe you could sit a centrurion dynamo core there if you idolise the science of the Dwemer rather than hold to the religeus devotion to any Aedra or Daedra. Ooo, that's just given me a great idea. I could look at adding a centurion bust 'shrine' accompanied by a Dwemer banner and have the 'Dwemer Shrine' bestow something like advanced smithing abilities or a minor boost to all crafting skills.

oh ok thanks :) i couldn't figure out why the marker was pointing to thin air. great mod btw :)

Thanks :) FYI, if you read the welcome letter left on the fireplace mantle it explains about the shrine and other main features of the house.