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Analytical Volumetric Lighting is a post-processing render feature intended to replicate the behavior of the volumetric lighting focusing on high performance and high real-time light count. This is achieved thanks to the analytical approach which makes per-light calculations constant-time. Instead of estimating air light integrals with raymarching, they are calculated precisely.
PERFORMANT - Made to be much more performant compared to the traditional raymarching volumetric lighting solutions. Based on the analytical approach, render up to thousands of volumetric lights at the same screen with frame times compared to SSAO* even on mobile platforms**.
REALISTIC - Lights behave similarly to the real world based on the inverse square law. This provides you with high-fidelity lighting with no spatial limits or approximation noises.
SIMPLE TO USE - A single Volumetric Light component to make the setup as easy as possible. All of the lighting parameters are named to be intuitively familiar assisting artists during scene creation.
CUSTOMIZABLE - Take control of what you're trying to achieve - whether it's a highly stylized game or a realistic demo showcase. This package contains source code with comments to assist with any further code customization.
Main Features
Clustered Rendering: Similarly to Forward+ rendering, lights are divided into clusters greatly lowering the rendering time required. Depth Culling feature makes use of the depth texture, culling lights behind walls and skipping unwanted calculations.
Upscaling Feature: Render at native 25% resolution (or any other) for a substantial performance boost.
No Draw Distance Limit: Draw distance is not limited compared to the raymarching solutions due to the analytical light equation solution. Render both close and far lights with the same fidelity at the same time.
No Noise Filtering: As raymarching is not being used, lights produce highly accurate values with no filtering required. This deeply improves lighting fidelity with no performance trade.
Deep Customization: Several useful parameters for each of your lights. Choose between light color and light temperature. Apply scattering parameter for the 'blurred' light sources.
Realistic Shapes: 7 Light Shapes, including Point, Spot, Area, Uniform lights with more to come in the future.
Mask Volumes: Limit volumetric fog to box & sphere volumes with a simple drag'n'drop component setup.
Global Fog: Use a custom global fog feature including a light scattering parameter highly increasing the believability of your game.
Distance Culling: Cull your volumetric lights based on camera distance with a smooth falloff.
Debug Overlay: Easy-to-use overlay to help you determine performance problems and other information.
Both Deferred and Forward rendering are supported!
Both Perspective and Orthographic camera projections are natively supported!
All the changes are applied instantly & viewable in Editor and Scene views.
Documentation & Full Source Code are available
分析体积照明是一种后处理渲染功能，旨在复制体积照明的行为，重点是高性能和高实时光数。这要归功于分析方法，它使每个光线的计算时间恒定。它不需要通过光线行进来估算空气光积分，而是通过精确计算来实现。
性能卓越--与传统的射线行进式体积照明解决方案相比，该方案的性能要高得多。基于分析方法，可在同一屏幕上渲染多达数千个体积光源，即使在移动平台**上，帧时间也比 SSAO* 短。
逼真--基于平方反比定律，灯光表现与真实世界相似。这为您提供了高保真照明，没有空间限制或近似噪音。
简单易用--单一的体积光组件使设置尽可能简单。所有照明参数的命名都非常直观，便于艺术家在创建场景时使用。
可定制 - 控制您想要实现的目标--无论是高度风格化的游戏还是逼真的演示展示。本软件包包含注释源代码，可帮助进一步定制代码。
主要功能
集群渲染： 与前向+渲染类似，灯光被分成多个群组，大大减少了所需的渲染时间。深度剔除功能利用深度纹理，剔除墙壁和墙壁后面的灯光。
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