Performers working in the games industry have spoken of their distress at being asked to work on explicit content without notice, including a scene featuring a sexual assault.
Sex scenes are common in modern games - and are often made by filming human actors who are then digitised into game characters.
But performers have told the BBC a culture of secrecy around projects - where scripts are often not shared until the last moment - means they frequently do not know in advance that scenes may involve intimate acts.
They describe feeling "shaken" and "upset" after acting them out.
Performing arts union Equity is demanding action from the industry - it has published guides on minimum pay, and working conditions in games, external, including on intimate or explicit scenes.
'I just found it disgusting' Jessica Jefferies is a professional casting director, who works mainly in video games and enjoys the medium.
Prior to that she was a motion capture performer - part of a small group who worked regularly for studios used by game developers.
Dressed in a skin-tight body suit, covered in markers, motion capture performers act-out the movements of characters in games on a large unfurnished set, where their motions are recorded digitally.
She said performers were often left in the dark about the nature of the game, or the scene, by developers.
"We'd get an email or a call from a studio saying we need you on these days for a shoot," she said.
"That was all the information we'd get."
Ms Jefferies told the BBC she was once asked to act out a scene with a male performer involving a sexual assault with no prior warning.
"I turned up and was told what I would be filming would be a graphic rape scene," she said.