One of the more challenging sequences involving the CG arm was in the lab, when after his first battle with Steve Rogers, The Winter Soldier retires for a series of painful repairs. During the scene, the actor sits in an operating chair, shirtless, while his battle damage is repaired. To fully integrate the CG into the live performance, part of the upper torso had to be re-constructed to make the relationship between the metal arm and the live flesh realistic. 

“It was interesting crafting a seamless coupling between the CG and the practical elements of the Winter Soldier plate. We had to create a scarred portion of Winter Soldier’s chest that not only had to be perfectly photoreal, but also needed to remain interesting and not overly gruesome, while making sense mechanically,” said Pavel Pranevsky, Luma’s Santa Monica-based CG supervisor on the project. “The CG extension then had to have a smooth connection to the actor’s body as his chest heaved and shook during the performance. It was a challenging piece of development to ensure the look and movement felt as natural as possible while preserving the dynamics of the actors movements.”

The close-up nature of many of these shots exposed much of the inner workings of The Winter Soldier’s bionics. The inspiration for the interior mechanics of the arm ranged from aircraft engines to surgical equipment, with Luma referring to clean and elegant mechanical designs, to ground the look the arm and make it believable. (x)

He's unstable.Erratic.

Tina Belcher  is the perfect representation of  every single fanfic writer.