REAL LIGHT 24 HDRI PRO PACK 03-逼真天空360度高动态范围图像HDRI贴图
本帖最后由 毅力坚强帝 于 2022-8-29 17:23 编辑**** 本内容需购买 ****
HDRI CALIBRATED 16K SKIES
One of the most popular methods, when lighting a 3D project, is what we know as IBL (Image Base Lighting), which consists of using a panoramic 360o high dynamic range image (HDRi) as a lighting source, to to reproduce as accurate as possible, the actual sky conditions at the time of capture. However, this technique has some important limitations and inconvenients, and that is why incorrect HDRi can cause problems when it comes to lighting our projects, sometimes causing worse results than automatic sky systems and sun that are included in most render engines.
This third HDRi Pro Pack, contains a selection of 24 HDRi designed to work independently of the other Packs, but at the same time complements it perfectly, providing new lighting alternatives for professionals.
Also in this new Pack, you will find high resolution images taken at the time each HDRi was captured. These images are ideal to be used as backplates in your renders since they fully coincide with the characteristics of the HDRi itself.
HDRI 校准的 16K 天空
在为3D项目进行照明时，最流行的方法之一就是我们所说的IBL（图像基础照明），它包括使用全景360o高动态范围图像（HDRi）作为光源，以尽可能准确地再现捕获时的实际天空条件。但是，这种技术有一些重要的局限性和不方便，这就是为什么不正确的HDRi在光照我们的项目时会导致问题，有时会导致比大多数渲染引擎中包含的自动天空系统和太阳更糟糕的结果。
第三个 HDRi Pro Pack 包含 24 个 HDRi 选项，旨在独立于其他 Pack 工作，但同时又完美地补充了它，为专业人士提供了新的照明替代方案。
同样在这个新的包中，您将找到在捕获每个HDRi时拍摄的高分辨率图像。这些图像非常适合用作渲染中的背板，因为它们与 HDRi 本身的特性完全一
WHAT DOES THIS PACK INCLUDES?
This HDRi Pro Pack 03 contains a collection of 24 high-resolution (16K) calibrated HDRi. The skies have been photographed in different seasons of the year, with very varied weather conditions and with a wide variety of time frames, so that you can find the perfect lighting for your project.
In addition, in this new Pack, all HDRi are complemented by up to 8 high-resolution (8K) photographs in CR2 format, obtained at the time and place where the HDRi was obtained, in order to be incorporated as Backplates in your renders.
此包包括哪些内容？
此 HDRi Pro Pack 03 包含 24 个高分辨率 （16K） 校准 HDRi 的集合。天空是在一年中的不同季节拍摄的，天气条件非常多样，时间框架也各不相同，因此您可以为您的项目找到完美的照明。
此外，在这个新的包中，所有HDRI都由多达8张CR2格式的高分辨率（8K）照片补充，这些照片是在获得HDRI的时间和地点获得的，以便作为背板合并到渲染中。
DYNAMIC RANGE
When capturing HDRi in skies with visible sun, one of the most common problems is the lack of dynamic range, due to the limitations of any real camera. 3D Collective’s HDRi have all the necessary dynamic range so you don’t have to modify anything in the file, and so that you can obtain real exposure value and luminosity in your projects. Simply load one of our HDRi to have a realistic lighting and a camera exposure matching real values.
REAL EXPOSURE VALUE IN 3D
在有可见太阳的天空中拍摄HDRI时，由于任何真实相机的限制，最常见的问题之一是缺乏动态范围。3D Collective的HDRi具有所有必要的动态范围，因此您不必修改文件中的任何内容，因此您可以在项目中获得真实的曝光值和亮度。只需加载我们的一个 HDRi，即可获得逼真的照明和与真实值匹配的摄像机曝光。
3D的真实曝光值
Another important challenge when creating this HDRi Skies Pack, has been to calibrate the HDRi exposure so that they are a true copy of reality. This allows us to create an exact copy of the real world in our 3D applications, obtaining a correct exposure of our camera in the project, and facilitating the incorporation of artificial lights with real luminosity values. Simply drag your sky to any 3D program to obtain absolute exposure values.
HIGH QUALITY HDRI AND 16K RESOLUTION
创建此 HDRi Skies Pack 时的另一个重要挑战是校准 HDRi 曝光，使它们成为现实的真实副本。这使我们能够在3D应用程序中创建真实世界的精确副本，在项目中获得相机的正确曝光，并促进将人造光与真实光度值相结合。只需将天空拖动到任何3D程序即可获得绝对曝光值。
高质量 HDRI 和 16K 分辨率
When it comes to capturing HDRi images, the most common method, is the use of fisheye lenses that allow a very fast capture of the photographs due to their wide angle of vision. However, this type of lens usually has problems of chromatic aberrations and they don’t allow to generate images of high resolution. In order to offer high quality 16K HDRi, all the skies of this pack have been captured with high resolution (50+ MP) cameras and high-angle rectilinear super angular lenses to minimize chromatic aberrations, allowing an original file of more than 24K which is then reduced to the final 16K HDRi file to reduce noise and guarantee the highest quality standards.
CLEAN HORIZONS WITH 180o COVERAGE
在捕获HDRi图像时，最常见的方法是使用鱼眼镜头，由于其宽视角，可以非常快速地捕获照片。但是，这种类型的镜头通常存在色差问题，并且它们不允许生成高分辨率的图像。为了提供高质量的16K HDRi，该包的所有天空都已使用高分辨率（50 + MP）相机和高角度直线超角镜头捕获，以最大限度地减少色差，允许超过24K的原始文件，然后将其减少到最终的16K HDRi文件，以减少噪声并保证最高质量标准。
180o 覆盖的清洁地平线
When using HDRi, there are several possibilities; There’s the HDRi that besides the sky contains the original horizon of the place of capture, this can cause that the trees, buildings, mountains, etc. from the location of the capture, are reflected in our projects. This might be useful to make a quick LookDev, however, when presenting a final project, it’s preferable to have independent control over the sky and the horizon.
In this new Pro Pack, all our HDRi have been captured and modified to eliminate any intrusive element on the horizon, keeping only elements such as distant small sized mountains that allow us to achieve a more realistic horizon and add important details when we use the HDRi as a background.
We have also extended the HDRi below the horizon line to avoid problems in projects at sea or near level 0.
使用HDRi时，有几种可能性;还有HDRI，除了天空包含捕获地点的原始地平线外，这可能会导致捕获位置的树木，建筑物，山脉等反映在我们的项目中。这对于快速制作LookDev可能很有用，但是，在展示最终项目时，最好对天空和地平线进行独立控制。
在这个新的Pro Pack中，我们所有的HDRI都经过了捕获和修改，以消除地平线上的任何侵入性元素，仅保留诸如遥远的小山等元素，这些元素使我们能够在使用HDRI作为背景时实现更逼真的地平线并添加重要细节。
我们还将 HDRi 扩展到地平线以下，以避免在海上或接近 0 级的项目中出现问题。
PRECISE COLORS AND COLOR TEMPERATURE
精确的颜色和色温
Another challenge when capturing HDRi images is preserving the original colors and color temperature to ensure consistency and allow a color temperature control similar to that of a photographer in real life. All of 3D Collective’s HDRi have been made with the help of several systems to check and correct the color and the exhibition such as Color Checker, Luxometer, grayscale charts, etc. If you want to modify the color temperature of your render, you can do it as a photographer would do in the physical camera or in post-production.
捕获HDRI图像的另一个挑战是保留原始颜色和色温，以确保一致性，并允许类似于现实生活中摄影师的色温控制。所有3D Collective的HDRI都是在几个系统的帮助下制作的，以检查和校正颜色和展览，如颜色检查器，照度计，灰度图表等。如果要修改渲染的色温，可以像摄影师在物理摄像机或后期制作中所做的那样进行修改。
SOME PROJECTS LIT WITH OUR HDRI
一些项目用我们的HDRI点亮
https://att.element3ds.com/data/attachment/upload_media/20220829/cj0vvz4twzpiwiv2.mp4?form=upload_media_8140
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感谢楼主精彩分享，向大佬学习！！！ 感谢楼主精彩分享，向大佬学习！！！
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