The 35-year-old actor, who is currently shooting for Guy Ritchie's "King Arthur", said that effects can be a hurdle for actors and limit their scope of performance, reported Entertainment Weekly.
"When it becomes very technical, those technical aspects create a rigidity to the process. Then all of the sudden, you have to find where your little place to fit into that process is, as opposed to the whole thing being about you," Hunnam said.
Directed by Guillermo del Toro, "Pacific Rim" was set in the 2020s, when Earth is at war with the Kaijus that emerged from an interdimensional portal on the bottom of the Pacific Ocean.
"I think world creation and monster creation and all of that stuff is exciting as a secondary element of storytelling. When it becomes more important than storytelling, I get very nervous, and you sort of lose me a little bit," he said
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With "Pacific Rim 2" to go on floors this year, Hunnam expects that they will be able to strike a right balance this time.
"I hope that we are able to remedy that a little bit going into the second. Not to say I wasn't proud of the film. I really liked it, and I felt like it delivered exactly what it was supposed to.