很有朋友对虚幻引擎都很有兴趣和好奇，通过几篇内容的分享大家还是会对这个“新人”抱有极大的“探索欲”。所以，Hi VFX尽量用通俗易懂的拙劣的翻译能力跟大家一起继续学习虚幻引擎究竟可以帮到影视从业人员什么。这期内容，紧跟Unreal Engine的步伐，继续学习一下吧！

Through exciting advancements in technology virtual production is changing the way we tell stories. This relatively new process in filmmaking has actually been evolving for some time now. with advances in real-time development platforms like Unreal Engine and with modern graphics processing technology with the latest in GPU architecture. We are able to tell stories in a much more organic and creative manner.

伴随着令人兴奋的技术前进，虚拟制作也正悄悄地改变着我们讲述故事的方式。这种相对较新的电影制作流程实际上已经存在一段时间了。同时，随着实时开发平台的技术提升，比如，虚幻引擎以现代图形处理技术以及最新的CPU架构等等。这些技术的提升使得我们可以用更加有机及创意的方式来进行故事的讲述。

A film set utilizing virtual production with Unreal Engine is able to take advantage of advanced interaction. New levels of realistic lighting scenarios. Machine learning artificial intelligence and real-time visual effects. All of these allow for real actors with live action feeds to mix CG elements directly on stage in the midst of production. This allows for live real-time decision making on set.

现在电影场景可以有力地借助虚幻引擎的虚拟制作来实现它的互动优势。它让现场的实际灯光照明、人工智能学习以及实时视效技术也达到了一个新高度。所有的这些都可以让真人演员在拍摄及制作电影过程中与现场的CG元素很好的融合。这个技术可以灵活地适应现场拍摄的各种需求和决策。

So what exactly is virtual production? Well, virtual production is the process of creating digital worlds that starts at the inception of the film and ends with real-time visual effects. All of these are centered around real-time interaction on stage. This enables production crews to see their scenes unfold as they are composed and captured on set. Therefore in summary, virtual production is where the physical and digital worlds meet.

究竟什么是“虚拟制作”？虚拟制作是一种创造数字世界的过程，它是从电影的开始一直到以实时的视觉效果结束。所有这些都围绕着拍摄现场的实时交互。

这使得制作人员可以在拍摄的现场就很清楚地了解画面的构图以及被捕捉到的元素合成之后的效果。总而言之，虚拟制作就是将现实和数字世界融合。

The traditional movie making process lacks in people and ideas early on, whereas virtual production allows for early interaction of all major components into a more immersive practice that brings the art and visual effects process into the heart of the action. By combining real world actors with CG element props and environments live from Unreal Engine. It is possible to achieve final shots live on set. This is possible by LED walls to display an Unreal Engine scene. Or a digital green screen for real-time in engine compositing. Significant accelerating overall production times. This enables real-world actors and props to creative interactive lighting and reflections from the CG environment and in some cases eliminates post-production workflows.

传统的电影制作过程中在项目前期欠缺的是将主创和创作的理念进行很好的确认。然而，虚拟制作则可以很好的解决这个问题，它可以在项目的早期就将参与的主创人员“沉浸”于项目内，让大家“身临其境”地通过由Unreal Engine提供的CG 元素及周边环境与实拍演员完美结合，从而将艺术与视效处理在制作准备的关键环节就把握好。它可以通过一个LED墙来展现出虚幻引擎的场景。或者通过一个在引擎合成里的实时数字绿幕来完成。这样的技术很显著地提高了整个的制作效率。它也让真实世界的演员及道具能够在CG 环境里进行很好的交互照明以及创造性的互动，同时，在某些情况下它也很好的解决了后期制作流程上的很多问题。

As the camera is moved, the Unreal Engine camera moves with it in the 3D world. Producing realistic parallax through the lens. This is possible by utilizing live link technology , which lets you connect a stream of real-time data to Unreal Engine, including cameras, lights ,and other production roles. Changes can be made in Unreal Engine. Live on set enabling scenes to be edited in ways that would traditionally be extremely difficult. Time consuming or downright impossible.

随着摄影机的移动，虚幻引擎摄影机在3D的世界里也会随之移动。通过镜头就可以产生真实的视差效果。它是通过利用live link技术实现的。它可以让你将实时数据流连接到虚幻引擎上，包括摄像机、灯光设备和其他的制作设备等等。所有的这些在虚幻引擎中都可以被改变。现场的实时功能可以让传统极其困难的编辑工作变得简单。耗时的问题也是绝对不需要担心的。

Changing positions of props for a particular camera angle or shot for example. Involves interactively picking it up and moving it. Scouting digital environments for shot placement is possible using virtual reality to explore and review scenes. Filmmakers can place themselves in a virtually accurate representation of the filming location to make better creative decisions. With the use of VR tools, including intuitive navigation and a virtual viewfinder, filmmakers can determine scene blocking and compose shots by taking screen grabs of the scene. VR scouting can also be used in conjunction with multi-user editing for powerful collaborative creative sessions. Using fingertip gestures, cinematographers and gaffers can dynamically control the lighting of a scene on set. Both with the CG environment and on the real world actors and props. This is possible via a rest style remote control API , which enables front-end web designers to build custom tools and interfaces to control Unreal Engine via remote procedure calls commands.

以为特定的相机角度来拍摄改变道具的位置举例。涉及到交互式抬高和移动问题。利用虚拟现实技术来探索和回顾场景，可以为镜头的位置寻找合适的数字环境。电影制作的人员可以把自己置身于一个相对来说比较准确的拍摄位置用以作出更好的创意决策。通过使用虚拟现实工具，包括直观导航和虚拟取景器，电影制作者可以通过抓取画面来确定场景块和组合镜头。虚拟探查设备也可以用来执行为剪辑服务的多用户协作会议工作。只要手指滑动引导，电影摄影师和灯光师就可以动态控制一个场景的灯光来。同样可以被动态控制的还有数字环境。这样的效果是通过rest样式远程控制API来实现的，该API使前端网页设计人员能 构建自定义工具和界面，以通过远程调用命令控制虚幻引擎。

相关知识点：（参考网址：
https://www.jianshu.com/p/6e8381c9b01d）

REST是一种软件架构风格，或者说是一种规范，其强调HTTP应当以资源为中心，并且规范了URI的风格；规范了HTTP请求动作（
GET/PUT/POST/DELETE/HEAD/OPTIONS）的使用，具有对应的语义。

应用程序接口（API），又称为应用编程接口，是软件系统不同组成部分衔接的约定。良好的接口设计可以降低系统各部分的相互依赖，提高组成单元的内聚性，降低组成单元间的耦合程度，从而提高系统的可维护性和可扩展性。”

Therefore, lighting can be adjusted from a device such as an iPad. This allows production teams to see an accurate representation of the final product early on in the creative process. This also allows for a very realistic collaborative approach to filmmakers by immersing them into the story. They are trying to tell.

因此，照明可以通过iPad等设备进行调节。这使得制作团队能够在创作过程的早期看到最终产品的精确效果。这种通过使得电影创作人“沉浸式”的制作方式，也可以很好的协助主创更好的讲述故事。

The development on Unreal Engine is constantly working to advance the tool sets of virtual production. If you want to learn more about how Unreal Engine can help your production, be sure to check out the virtual production with Unreal Engine website. Where you can find podcasts and spotlights on productions. Utilizing the latest in virtual production technology. Also be sure to download the free virtual production field guid developed by Epic Games. The marketplace is always adding content and samples that you can download and use to learn and build with. Finally be sure to check out the online learning library for Unreal Engine. Through a complex tool set Unreal Engine provides the technology for creators to take full advantage of the latest in cutting edge virtual production. Scalable from professionals to independent artists. Unreal Engine is continuously under development to provide the best real-time production tool for large film sets, television productions and smaller independent content creators.

虚幻引擎的开发也在不断地升级虚拟制作的工具集。如果你想要了解更多关于虚幻引擎可以如何协助制作的问题的话，打开官网。你就可以看到很多利用最新的虚拟生产技术结合不同领域实用的指导内容了。另外，你可以下载Epic Games为大家准备的针对影视制作人员免费的虚拟制作官方指导介绍。当然啦，Hi VFX也建议你不要错过官网上针对虚幻引擎的在线学习内容。这部分在线学习的内容Epic Games都已经为大家整理划分到位，你只要好好学习天天在线就好啦！