## 3 Results
### Case Studies in the Spanish Market
Conversely, VPX introduces a multi-threaded, parallel approach, emphasizing the importance of meticulous pre-production planning to seamlessly integrate VFX from the final stage into pre-production and shooting. Thorough testing and pre-shoots are essential to identify and address potential issues that may arise during filming. On-set, incomplete, or subpar production assets can be seamlessly replaced with a greenscreen, recorded using the LED wall as a backdrop. This technique retains lighting and reflections from the digital environment while only replacing the recorded green elements. Directors gain quick access to multiple locations without the need for extensive travel \begin{table}
\begin{tabular}{p{56.9 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline
**Producer** & **Experience in VPX** & **Type of VPX Developed** & **Limitations** \\ \hline MR Factory & More than 5 years & Real-time Chroma VPX: The data and media are recorded: the original greenscreen plate, the mate using the Ultimate keyer, the CG backdrop, an FBX file with the camera tracking data, and a composite version of the shot. & Need some type of post-processing (real-time or traditional post-production) \\ \hline Orca studio & 4 years & LED Wall VPX: film market and they offer vertical services & At some angles of the shooting, it can obtain moiré patterns for the LED walls \\ \hline El Ranchito & More than 5 years & Assets and BG creation: camera could be controlled to obtain the desired shot as if it were the photo mode of a video game. Their approach is more in the development of tools and in the creation of CGI assets & Traditional 3D asset creation \\ \hline Koru Media Labs & 1 year experience & Unreal Engine works as a HUB where all artists can connect at some point. & New pipelines and software applications need to be learned by the CGI artist. \\ \hline \end{tabular}
\end{table} 
Table 2: Virtual production casusist for each company. or cast and crew relocation. These efficiencies can result in approximately a 30% budget reduction by expediting processes and consolidating activities in a centralized location [49]. The advantages of VPX with a chroma backdrop harken back to the filmmaking style of Hollywood's golden age, providing greater control over the shooting environment. Workflows may involve shooting for the final pixel using real-time compositing or opting for a post-processing approach in post-production. The latter provides access to various essential elements such as the original plate, matte, 3D file with camera movement, 3D background render, and the composite plate as a Postviz. While achieving lighting consistency can be challenging with chroma backdrops, VPX allows real-time adjustments by observing the reference monitor. A notable advantage of working with chromas compared to LED walls is the ability to use several cameras simultaneously against the chroma backdrop. The integration with traditional CGI asset creation is nearly seamless, with the pipeline often involving the use of Maya and Houdini for 3D asset production, followed by insertion into Unreal. The accelerated production schedule eliminates the need to wait for image rendering, providing dynamic feedback to clients. However, the careful coordination and development of assets for Unreal Engine are crucial, demanding adherence to specific requirements. Unreal's real-time rendering necessitates optimized geometry, UVs, and textures, requiring precision in software like Maya or Houdini. Despite these challenges, the final quality of assets, especially for environments like rocky landscapes, rivals or surpasses classical methods. While close-ups of organic characters with hyper-realistic details may still favor traditional methods, the difference is diminishing, and real-time benefits often outweigh the minor quality distinctions [52]. The workflow for a 3D animated film undergoes a substantial transformation by centralizing all processes within Unreal Engine.