Avengers: Age of Ultron (2013) - Ultron Concepts 2

Another view of my favorite design, I did this rendering to show the character in a more animated pose, with some expression.

Another of my earliest attemps at Ultron.

At one point, director Joss Whedon decided he wanted Ultron to have more identifiable mechanical components, so we all went back to the drawing board for another round.

This design gained a lot of tracktion with Joss, so we pursued it further...

Eventually leading to this design, which was approved by Joss.

A concept for how Ultron Prime would look with Molten Vibranium pouring onto his body.

Turnarounds for the selected Ultron. At the eleventh hour Kevin Feige expressed his concern thatit didn't have enough character (something we'd all been secretly feeling). Lucky for us or we would never have gotten Charlie Wen's now iconic design.

A design from the last pass, incorporating a shoulder joint design by Ryan Meinerding.

Another version.