There is a tree in this spot but it’s smaller than what you see on the screen. Another tree was added on top of the that tree, as was the huge branch in the background. The fungi were also added. The purple one was animated to spit out spores in a cloud. Something about the battle-gear; The helmet and a gorget around Bjorn’s neck is made out of rubber. You can see the sculptures in the ”Galleries” section on this page. The sword is made out of wood and plastic. He did wear a real steel chain mail.