很有朋友對虛幻引擎都很有興趣和好奇，通過幾篇內(nèi)容的分享大家還是會對這個“新人”抱有極大的“探索欲”。所以，Hi VFX盡量用通俗易懂的拙劣的翻譯能力跟大家一起繼續(xù)學習虛幻引擎究竟可以幫到影視從業(yè)人員什么。這期內(nèi)容，緊跟Unreal Engine的步伐，繼續(xù)學習一下吧！

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.

伴隨著令人興奮的技術前進，虛擬制作也正悄悄地改變著我們講述故事的方式。這種相對較新的電影制作流程實際上已經(jīng)存在一段時間了。同時，隨著實時開發(fā)平臺的技術提升，比如，虛幻引擎以現(xiàn)代圖形處理技術以及最新的CPU架構等等。這些技術的提升使得我們可以用更加有機及創(chuàng)意的方式來進行故事的講述。

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.

現(xiàn)在電影場景可以有力地借助虛幻引擎的虛擬制作來實現(xiàn)它的互動優(yōu)勢。它讓現(xiàn)場的實際燈光照明、人工智能學習以及實時視效技術也達到了一個新高度。所有的這些都可以讓真人演員在拍攝及制作電影過程中與現(xiàn)場的CG元素很好的融合。這個技術可以靈活地適應現(xiàn)場拍攝的各種需求和決策。

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“虛擬制作”？虛擬制作是一種創(chuàng)造數(shù)字世界的過程，它是從電影的開始一直到以實時的視覺效果結束。所有這些都圍繞著拍攝現(xiàn)場的實時交互。

這使得制作人員可以在拍攝的現(xiàn)場就很清楚地了解畫面的構圖以及被捕捉到的元素合成之后的效果?？偠灾?，虛擬制作就是將現(xiàn)實和數(shù)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.

傳統(tǒng)的電影制作過程中在項目前期欠缺的是將主創(chuàng)和創(chuàng)作的理念進行很好的確認。然而，虛擬制作則可以很好的解決這個問題，它可以在項目的早期就將參與的主創(chuàng)人員“沉浸”于項目內(nèi)，讓大家“身臨其境”地通過由Unreal Engine提供的CG 元素及周邊環(huán)境與實拍演員完美結合，從而將藝術與視效處理在制作準備的關鍵環(huán)節(jié)就把握好。它可以通過一個LED墻來展現(xiàn)出虛幻引擎的場景?；蛘咄ㄟ^一個在引擎合成里的實時數(shù)字綠幕來完成。這樣的技術很顯著地提高了整個的制作效率。它也讓真實世界的演員及道具能夠在CG 環(huán)境里進行很好的交互照明以及創(chuàng)造性的互動，同時，在某些情況下它也很好的解決了后期制作流程上的很多問題。

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.

隨著攝影機的移動，虛幻引擎攝影機在3D的世界里也會隨之移動。通過鏡頭就可以產(chǎn)生真實的視差效果。它是通過利用live link技術實現(xiàn)的。它可以讓你將實時數(shù)據(jù)流連接到虛幻引擎上，包括攝像機、燈光設備和其他的制作設備等等。所有的這些在虛幻引擎中都可以被改變。現(xiàn)場的實時功能可以讓傳統(tǒng)極其困難的編輯工作變得簡單。耗時的問題也是絕對不需要擔心的。

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.

以為特定的相機角度來拍攝改變道具的位置舉例。涉及到交互式抬高和移動問題。利用虛擬現(xiàn)實技術來探索和回顧場景，可以為鏡頭的位置尋找合適的數(shù)字環(huán)境。電影制作的人員可以把自己置身于一個相對來說比較準確的拍攝位置用以作出更好的創(chuàng)意決策。通過使用虛擬現(xiàn)實工具，包括直觀導航和虛擬取景器，電影制作者可以通過抓取畫面來確定場景塊和組合鏡頭。虛擬探查設備也可以用來執(zhí)行為剪輯服務的多用戶協(xié)作會議工作。只要手指滑動引導，電影攝影師和燈光師就可以動態(tài)控制一個場景的燈光來。同樣可以被動態(tài)控制的還有數(shù)字環(huán)境。這樣的效果是通過rest樣式遠程控制API來實現(xiàn)的，該API使前端網(wǎng)頁設計人員能 構建自定義工具和界面，以通過遠程調用命令控制虛幻引擎。

相關知識點：（參考網(wǎng)址：
https://www.jianshu.com/p/6e8381c9b01d）

REST是一種軟件架構風格，或者說是一種規(guī)范，其強調HTTP應當以資源為中心，并且規(guī)范了URI的風格；規(guī)范了HTTP請求動作（
GET/PUT/POST/DELETE/HEAD/OPTIONS）的使用，具有對應的語義。

應用程序接口（API），又稱為應用編程接口，是軟件系統(tǒng)不同組成部分銜接的約定。良好的接口設計可以降低系統(tǒng)各部分的相互依賴，提高組成單元的內(nèi)聚性，降低組成單元間的耦合程度，從而提高系統(tǒng)的可維護性和可擴展性?！?/p>

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，照明可以通過iPad等設備進行調節(jié)。這使得制作團隊能夠在創(chuàng)作過程的早期看到最終產(chǎn)品的精確效果。這種通過使得電影創(chuàng)作人“沉浸式”的制作方式，也可以很好的協(xié)助主創(chuàng)更好的講述故事。

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.

虛幻引擎的開發(fā)也在不斷地升級虛擬制作的工具集。如果你想要了解更多關于虛幻引擎可以如何協(xié)助制作的問題的話，打開官網(wǎng)。你就可以看到很多利用最新的虛擬生產(chǎn)技術結合不同領域實用的指導內(nèi)容了。另外，你可以下載Epic Games為大家準備的針對影視制作人員免費的虛擬制作官方指導介紹。當然啦，Hi VFX也建議你不要錯過官網(wǎng)上針對虛幻引擎的在線學習內(nèi)容。這部分在線學習的內(nèi)容Epic Games都已經(jīng)為大家整理劃分到位，你只要好好學習天天在線就好啦！