"When you go back to the original Marvel work, the force field takes on all kinds of surface textures," Williams said. "In some cases it can look like kind of a heart shape. Almost like glass in some cases, especially in the more recent work. She can build glass boxes and enclosures with it and it can be broken.
"And in our case, it's going to be sort of a hybrid between that and a bit of a membrane or liquidy feel to it. And one of the things that's really hard is to separate her from, for instance, the Jean Grey-type stances and some of the other Marvel characters, is Sue really, not only is her invisibility driven by her emotions, so is the force field. And in this movie, it begins as a very defensive thing in her character where she generates a force field as she has to sort of defend herself or the other Fantastic Four.
"And towards the end of the movie, she gets to where she can really generate it and use it more offensively. So that¹s an important evolution of her character."
Williams said that in terms of the visual approach to the force field, initially it won't be as well refined.
"Just like all her powers," he said. "And in the latter part of the movie, it¹s going to be a little more refined, a little more accurate so to speak, and it¹s going to be a neat look. We¹ve got some good tests with it and it interacts with flame in some cases in the movie and it looks pretty cool."