With the rapid development of modern technology, the film and television industry in the production of this aspect, in addition to the traditional green screen production, but also appeared through the use of LED wall for virtual production.
So what is the difference between virtual production vs green screen, let’s look at it together.
Basic concepts
Green screen
Green screen, also known as chroma keying, is a visual effects (VFX) technology.
The principle is to place the filmed objects and characters in front of the green screen, and then perform keying and other operations through Computer Generated Images (CGI) to replace the green background image with the desired background image, thus producing a satisfactory movie and television effect.
Virtual Production
Virtual production is a film and television production technology that combines physical manufacturing technology and real-time digital tools.
The most commonly used equipment in virtual production is the LED wall, which combines live-action elements, computer-generated images, and virtual environment technology to enhance the visibility of the director and crew during the shooting process, making the production process more efficient and creative.
It is worth mentioning that virtual production has extremely high requirements for picture quality, and it is generally necessary to use at least 8K LED walls to meet virtual production requirements.
Virtual Production vs. Green Screen：What’s the difference
Cost Considerations
In the early stages, the production cost of a green screen will be lower than that of a virtual production LED wall. The reason is that the virtual production of LED wall in order to be able to create a more detailed, vivid, realistic picture background image.
Its process will be more complex, resulting in its manufacturing costs will be more expensive. The green screen will only need to buy a few brackets and green curtains can be shot, its manufacturing costs will be cheaper.
In the later stage, the green screen will cost the labor cost will increase over time, while the virtual production of the labor cost of the LED wall will not change dramatically over time. The reason for this is that the post-production video processing of green screens requires frame-by-frame image manipulation, which consumes a very high labor cost. The virtual production of the LED wall due to the real-time background effect display, do not need to carry out too much image processing, its processing difficulty will be much lower than the green screen, resulting in its labor costs will be lower.
Screen presentation
If the green screen is used in the film and television production process, then in order to be able to present the best results in the later stage, you need to complete the correct green screen composition and exquisite physical set placement, at the same time, also need to pay close attention to the details of the placement and direction of the lighting.
If the virtual production of LED wall for film and television production, then it will provide you with the best background image. The reason is that the virtual production of the LED wall has a high resolution, high contrast and high color accuracy performance, can be for the scene personnel to bring a vivid and realistic background image, so that the actors can better immersive performance, shooting a fascinating film and television effects.
Visualization
As the background of green screen is green, there is no specific physical reference, so it is very test of the actor’s skills and the shooting staff’s skill of filming, making the scene is not very high degree of visualization, you need to rely on the post-production editing, keying and other details of the operation, in order to be able to present to the audience the perfect film and television effects.
Compared with the green screen, the degree of visualization of the virtual production of the LED wall will be much higher. It can provide an immersive platform for the actors, allowing the director to better observe the direction of the development of the plot and the expression of the characters’ emotional actions, greatly improving the overall efficiency of the crew.
Flexibility
Green screen setups require creating content in one place or multiple places, and although they allow for flexible object placement, they take longer and don’t give the director and producer any room to quickly and easily test different ideas and creativity.
In contrast, a virtual production LED wall offers producers much more flexibility. The ability to quickly and easily modify the background display allows directors and producers to test different ideas and concepts without having to physically lay out the items, which greatly reduces the amount of time that directors and producers have to think about the scene and thus saves time and money.
Cleaning Method
Since the virtual production LED wall is an electronic display device, it generally needs to be cleaned and maintained in order to prolong its service life. Its surface can be cleaned with a cleaning cloth or a soft brush. At the same time, when cleaning, should try to avoid salt water or iron powder into the LED wall, the reason is that the salt water and iron powder can be on the internal structure of the LED wall chemical reaction, resulting in corrosion phenomenon.
As for the green screen, its cleaning method is not very important, because most of the crew will use a green fabric as a background, so they shoot finished, only need to clean the fabric on it, so as to facilitate the use of the next shooting production.
Infrastructure
In terms of infrastructure, Green Screen is different from a virtual production LED wall. Green screen in addition to the main bracket and green screen, but also need a special green screen lights, its light on the green screen, can make the green screen by the light evenly, will not appear obvious bright spots.
While the virtual production of the LED wall, it is mainly composed of LED modules and cabinets, while it needs to use advanced filming machines for filming, to better capture the dynamic performance of the actors and delicate background images, to reduce the pressure of the post staff.
Layout time
Before the movie and television production, the scene needs to be set up in advance. When setting up a green screen, it takes a lot of time to prepare the lighting and additional background settings, which are used as a “record” for reference so that the same layout can be used in post-production.
When setting up a virtual production LED wall, the initial setup and setup time is longer than with a green screen, but the setup work is largely eliminated in post-production, as the LED wall can be connected directly to the computer for projection, creating a digital environment for live shooting.
Post-production
The use of virtual production LED wall can save a lot of time and energy for post-production. Here’s why.
The virtual production of LED walls can provide actors with realistic background images, in the shooting, has been completed on the replacement of the background image, greatly saving the post-production of editing time.
At the same time, the virtual production of the LED wall can be real-time picture angle and light adjustment, can effectively reduce the pressure of post-processing images, greatly improving the efficiency of post-processing staff.
For the green screen, in the post-processing image processing, you need to communicate with the director and producer, and need to take the trouble to replace the background and characters and the details of the modification, its workload is very huge, and need to spend a lot of time and energy to be able to attract the attention of the audience.
Factors affecting the choice of LED walls and green screens for virtual production
Budget
When you have a very large budget, choose to purchase a virtual production LED wall, which can bring you an immersive and immersive experience, and effectively reduce the pressure of post-production editing and image processing.
When your budget is relatively tight, you can choose green screen, which can also present the audience with very good picture effects, but these picture effects can not be separated from the efforts of post-production staff. The labor cost will be higher.
Creative Needs
If you need a more precise degree of illumination and complex visual interaction of the scene, then the virtual production of the LED wall is a good choice, it can provide an unparalleled sense of reality and versatility, can be switched at any time on the background screen, for the conversion of different perspectives. Green Screen is not able to provide such services for these scenes, but only according to the actual requirements for the layout and lens operation.
Production scale
If your production space is very large and complex, then the virtual product LED wall will be your choice. It creates an immersive and interactive environment that will give you a different visual experience. If your production space is very small or simple, then you can choose the green screen, to a certain extent, to reduce the difficulty of image processing.
Production cycle
Because the virtual production of the LED wall can change the background content in real time, can greatly reduce the production cycle of film and television works. The green screen, on the other hand, because of the huge amount of post-production work, the production cycle of the movie and television production will only continue to increase with the content of the shooting.
Will the virtual production LED wall replace the green screen?
Virtual production of the LED wall does not completely replace the green screen, the reason is that the virtual production of the LED wall of the process is not particularly mature, resulting in its price will be higher than the price of the green screen, can not be used for cash-strapped crews. But I believe that, with the future development of science and technology, the virtual production of the LED wall price will be reduced with the maturity of the process, thus gradually replacing the green screen for film and television production.
Why choose LED wall for virtual production?
Because LED wall can reduce the cost of post-production image processing for virtual production, so that the actors can better carry out immersive performances, reduce the probability of reshoots, and so on.
Conclusion
Through the study of this article, we can understand the concept of green screen and virtual production, the difference and how to choose. If you are interested in the LED wall for virtual production, then you are welcome to consult us, we will provide you with professional services.
