Unreal Engine虚幻引擎 5
ref:http://next.poppur.com/Stylish/10596.html
https://www.unrealengine.com/en-US/blog/a-first-look-at-unreal-engine-5
Author:Alex
发表时间2020-05-14 12:09:33
2012 年，Epic Games 首度展示了游戏引擎 Unreal Engine 4 的实机视频，该引擎强大的可塑性对游戏界的影响深远。而在 8 年后的今天，更先进的 Unreal Engine 5 引擎终于要来了。Epic Games 于 5 月 13 日公布了虚幻引擎 5 在 PS5 上运行的实机画面，让玩家能够一窥次世代游戏的无穷魅力。
该演示展示了虚幻引擎5的两大全新核心技术：Nanite 和 Lumen。
Nanite 虚拟微多边形几何体可以让美术师们创建出人眼所能看到的一切几何体细节。Nanite 虚拟几何体的出现意味着由数以亿计的多边形组成的影视级美术作品可以被直接导入虚幻引擎——无论是来自 Zbrush 的雕塑还是用摄影测量法扫描的 CAD 数据。Nanite 几何体可以被实时流送和缩放，因此无需再考虑多边形数量预算、多边形内存预算或绘制次数预算了；也不用再将细节烘焙到法线贴图或手动编辑 LOD，画面质量不会再有丝毫损失。
Nanite virtualized micropolygon geometry frees artists to create as much geometric detail as the eye can see. Nanite virtualized geometry means that film-quality source art comprising hundreds of millions or billions of polygons can be imported directly into Unreal Engine—anything from ZBrush sculpts to photogrammetry scans to CAD data—and it just works. Nanite geometry is streamed and scaled in real time so there are no more polygon count budgets, polygon memory budgets, or draw count budgets; there is no need to bake details to normal maps or manually author LODs; and there is no loss in quality.
Lumen 是一套全动态全局光照解决方案，能够对场景和光照变化做出实时反应，且无需专门的光线追踪硬件。该系统能在宏大而精细的场景中渲染间接镜面反射和可以无限反弹的漫反射；小到毫米级、大到千米级，Lumen 都能游刃有余。美术师和设计师们可以使用 Lumen 创建出更动态的场景，例如改变白天的日照角度，打开手电或在天花板上开个洞，系统会根据情况调整间接光照。Lumen 的出现将为美术师省下大量的时间，大家无需因为在虚幻编辑器中移动了光源再等待光照贴图烘焙完成，也无需再编辑光照贴图 UV。同时光照效果将和在主机上运行游戏时保持完全一致。
Lumen is a fully dynamic global illumination solution that immediately reacts to scene and light changes. The system renders diffuse interreflection with infinite bounces and indirect specular reflections in huge, detailed environments, at scales ranging from kilometers to millimeters. Artists and designers can create more dynamic scenes using Lumen, for example, changing the sun angle for time of day, turning on a flashlight, or blowing a hole in the ceiling, and indirect lighting will adapt accordingly. Lumen erases the need to wait for lightmap bakes to finish and to author light map UVs—a huge time savings when an artist can move a light inside the Unreal Editor and lighting looks the same as when the game is run on console.
虚幻引擎 5 将在 2021 年早些时候发布预览版，并在 2021 年晚些时候发布完整版。它将支持次世代主机、本世代主机、PC、Mac、iOS 和 Android 平台。