For (a random) example, what is the process behind thinking ‘I want two people sword fighting on top of a moving train in the mountains’ and seeing that formed on the screen. How are those images generated, is it purely animation, does it involve prop actors with green screens, etc.
In: Technology
As u/CyclopsRock said: it depends. Actors may be put in front of a green screen with certain other elements covered in the same green, which will all be replaced with other imagery (potentially computer generated). The specific green is chosen because it’s generally not a color people naturally wear/have and can be edited out with video editing tools. Such as in your example, a green platform in the general shape of the train (or a train car itself) could be placed on a stage in front of a green screen with fans blowing gusts of air at the actors to simulate movement. Other props could be digitally added later. Say, for example, a sign fast approaches and the hero needs to duck underneath it. The actor could act out ducking in alarm, then a crossbar with a sign on it could be edited into the shot to simulate a real sign flying past him at speed. Of course, they could also be Jackie Chan and actually have the actor on a train duck under a rapidly approaching sign.
Actual graphics, ie a T-rex chasing characters across a field, is made up of polygons that are generated in a 3d modeling program like Blender. Those polygons can be manipulated and given additional complexity and attached to each other, then coordinated and animated so that they all move in a believable fashion. A picture can then be painted on the polygons via texture mapping where images that give the illusion of texture are wrapped over the polygons.
Latest Answers