'HDRI from scratch tutorial'--绘制HDRI
'HDRI from scratch tutorial'
by seger van wijk
原文链接:http://www.3dtotal.com/team/Tutorials/hdri_from_scratch/hdri_01.asp
![](http://www.3dtotal.com/team/Tutorials/hdri_from_scratch/index-pic.jpg) Introduction : (简介)
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In this new tutorial, I will guide you into making a simple self-made HDRI from scratch, without the use of a photo camera. As you may know by now, an HDRI-image is the simulation of light in its natural state: as a high dynamic physics feature. Otherwise, simply Google HDRI and find all about the subject. The human eye is so fast in adapting to different light situations, and your monitor is actually so bad at representing the enormous space between the inside of your jeans back pocket at night and a bright day at the equator, that the fact that the sun is so powerful may strike you only after a day on the beach without a proper sun block. I guess the 32-bit room that we will use is still far from insufficient to capture the whole range between dark and light but it does do an extremely well job.
(在这个新的教程里,我将教导你如何在PS里制作一个简单的HDRI图像,而不是使用一张相机图片。正如你所知,一张HDRI图像是对自然环境光线的解算,这是一张高动态范围图像的特征。你可以简单的google一下HDRI,搜索所有这方面的主题。人的眼睛对不同环境的光线能非常迅速的适应,而你的显示器在表现夜晚你夹克口袋里的黑色背面与白天的地球赤道之间巨大的差异上却相当糟糕,这个事实导致你在没有合适遮阳伞的情况下,在沙滩上待一天会受到太阳很强的伤害。即便是我们将要使用的32位的图像空间依然不足以捕捉在黑和白之间的整个范围,但这已经足以很好的完成工作了。)
There’s a lot of HDRI photo material available from parties such as 'Sachform' and 'Dosch Design' that can be very useful in giving light and atmosphere to your 3D-scenery. But when your client wants a simple classic four-window reflection in his water drop, none of the beautiful things they sell, nor any of what you will find that is free to use, will do. Then of course, you do it yourself!
(商业上有很多HDRI的照片素材,比如Sachform' 和 'Dosch Design',他们在给你的3维场景进行照明和烘托环境时是非常有用的。但是当你的客户希望有一个简单的经典的4格窗户反射在掉落的水滴上时,他们所销售的东西就没什么合适的了,而你也找不到任何可以免费使用的贴图。最后只能是自己DIY了。)
Apart of course from any major 3D package, you will need Photoshop CS2, in order to be able to merge a number (I will use 7) of “lighting situations” into a single radiance document. This radiance document will have a 32-bit range of dynamics, enough information to actually light your scene, throw shadow and make reflections without the use of specular shaders or channels. I won’t go into minute details of setting up the scene.
(请离开任何主流的3d软件包,你需要的是PS CS2,以便能够合并一系列(我将用7张)不同的照明状态图像到一个单一的图像文件中。这个图像文件将有32位的动态范围,能给你的场景提供足够的照明信息,投射阴影,制造反射而无需使用特殊的材质和通道。对于设置场景的过程我不打算阐述具体细节。)
The final render before we proceed: This image and the shadow are purely made with the HDRI that we will make ourselves without the use of a camera. For the sake of purity I haven’t edited the image afterwards:
(在我介绍前先看下最终的渲染图片:这张图片和阴影都仅仅由我们自己做的HDRI图产生,没有使用摄像机。为了保存最原始的效果,我没有对其进行任何后期处理。)
This is the render.(这是渲染的图片)
![](http://www.3dtotal.com/team/Tutorials/hdri_from_scratch/hdrifromscratch_img_2.jpg)
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