Special effects of The Lord of the Rings film series Later on, the scenes were merged using digital effects. Besides Weathertop, many of the other scenes in the Lord of the Rings trilogy were shot in this way, first by filming the scenery or set miniatures, then the actors on a studio set, and merging the two together. An example of this is in the Mines of Moria, when the Fellowship was fighting the Cave-troll in Balin's Tomb, and again when the Fellowship is on the Khazad-Dum stairs and bridge. Gandalf has his own particular scene with computer graphics as he grapples with the Balrog as they fall to their
The Lord of the Rings fighting strength and rides with his men to the ancient fortress of Helm's Deep, while Gandalf departs to seek help from Treebeard. Meanwhile, the Ents, roused by Merry and Pippin from their peaceful ways, attack Isengard, Saruman's stronghold, and trap the wizard in the tower of Orthanc. Gandalf convinces Treebeard to send an army of Huorns to Théoden's aid. Gandalf brings an army of Rohirrim to Helm's Deep, and they defeat the Orcs, who flee into the "forest" of Huorns, never to be seen again. Gandalf offers Saruman a chance to turn away from evil. When Saruman refuses to listen,