> "Then there's Rocky. He's the alien co-lead, and he's not CGI. Neal Scanlan, the creature designer who built the Porgs for Star Wars, spent a full year on this character. Over 300 designs before they landed on the final look. Rocky is a thin, hollow shell, 3D-printed from a digital sculpture, then hand-painted in see-through layers so light passes through him like skin. His arms pop off and swap out depending on the scene: one set has a closed fist for walking, another has tiny motorized fingers strong enough to pick up objects. Five puppeteers (nicknamed the "Rockyteers") operated him in every scene. James Ortiz, an award-winning puppet designer from New York theater, voiced Rocky and controlled him on set. When Scanlan met him, he told Ortiz, "You're Frank Oz, and I'm making Yoda for you." Every reaction Gosling gives to the alien is to something physically in front of him."

The level of detail and puppets / tech / etc. is so impressive.