Global Illumination is a Real-Time Engine term in filmmaking. In virtual production, the nuances of this term take on special meaning. Here, we break down the definition to give you a starting point.
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If you're a filmmaker interested in creating photorealistic imagery with virtual production, then you must understand the concept of global illumination. Global illumination is a method of virtual lighting that allows for greater realism by simulating the indirect and bounced properties of physical light. In other words, it creates an environment where the lights interact with objects as they would in reality - resulting in realistic shadows and textures that are difficult to replicate any other way.
The importance of global illumination for virtual production is twofold: firstly, it enables filmmakers to craft better-looking images; secondly, it allows them to achieve those visuals more quickly and efficiently than if they were using traditional lighting methods. For instance, when a scene is lit traditionally, several lights must be placed around the set to provide enough coverage - this can be time-consuming and expensive. With global illumination, however, these issues can be eliminated since all lighting calculations are done automatically, meaning that only one light source needs to be used. This also means less manual labor is required, thus saving both time and money.
Global illumination has become increasingly popular among filmmakers due to its ability to create realistic-looking environments that are much easier to control. It can simulate different types of light sources such as daylight, artificial lights, or even ambient occlusion - giving filmmakers ultimate control over their digital sets. By utilizing global illumination techniques, directors can craft scenes that look like they have been filmed on location without worrying about the complexities of setting up multiple light sources.