Motion-capture acting is like playing dress-up and pretending to be a character in a video game or movie. Just like how we play pretend with costumes to become a firefighter or a princess, motion-capture actors wear special suits full of sensors that track their movements.
These sensors capture every movement the actor makes and turn them into computer data, just like the way a camera takes pictures. The computer can then turn this data into a 3D digital character that moves just like the actor did in real life.
So, when the actor moves their arms or legs, the digital character moves its arms or legs in the same way. This is how characters in movies like Avatar or video games like Assassin's Creed look so realistic and move so fluidly.
It's important to note that motion-capture actors not only have to act out the physical movements of their character, but they also have to act out their emotions and facial expressions. This is usually done with special cameras that capture their facial movements and translate them onto the digital character's face.
Overall, motion-capture acting is a great way to bring digital characters to life, and it takes a lot of skill to pull off convincingly.