French magazine SFX has 3 great interviews with Arthur Max, Conor O'Sullivan pro

Arthur Max : The Prometheus was designed by Steve Burg and Ben Procter. The Prometheus is composed of independant parts that can separate from the main body if needed (Vickers area is a skif/ship by itself) doubt it will cometo play in the movie tho... The approach to the Engineers tech was to take the Giger look but make it more mechnical than bio by adding an obvious metal feel. Engineers are partly inspired by the persian civilisation. Richard Stammers Visual effect supervisor : Weta is doing all the xeno like creatures. There were sculptures on set so the actors can react but those monsters will be full cgi. Weta also did the rise of the pilot chair sequence. They used model kits from the market to help them remake the pilot chair. The Juggernaut is full CGI, it has been re-designed by Steve Messing. The original derelict was not detailed enough they had to recreate them, GUTALIN was hired to for that, his Gigerian but yet more mechanical style was perfect for the look they wanted. At first it was tought it would be necessarry to use models for the colision and crash but after seeing the Yatch scene from xmen first class (???) he decided to go full cgi. When Scott visits MPC, he doesnt stay in the reunion room but go check the cgi artists themselves, giving input or modification on the spot. Conor O'Sullivan prosthetics supervisor : The Engineer and his suit have been designed by Nevil Page. He has a very symitrical face wich enchance his alieness even if he is humanoid. At first Scott was not sure that prosthetics could achieve teh level of details he wanted. Conor told him they use now a great technique that has remarkable results (there is a long explanation of what it is in the interview). At first Connor made a test, he sculpted the Engineer's head, then animated the eyes by cgi. It was part of the showreel Scott showed Fox to get the greenlight. The Enginneer is not a full suit but is made of many many many prosthetic parts from head to toes. Ian Whyte played the Engineer for all the scene with the humans (wich take place in the second part of the movie), when Engineer(s) are alone it's normally sized actors. For the closeups Ian Whyte face did not worked, they could not get the look they wanted so they used the "normal" actors wich have been also chosen because of their face. One scene got Connor a bit nervous because the Engineer is almost fully naked. He was not sure the thin material would resist the shoot, he explain how they did it and says how much it looks good on screen. Ian Whyte had a 32 days shoot, they had to replace the suit every 3 days. He end up saying that he's really happy how the character feel alive on screen. That he is not a special effect but a living and breathing and frightening creature. Oh he also talks about an aging makeup of one of the characters (guess who ^^) wich has to be done faster than usual because the actor was cast a few weeks near the shooting.