来自专筑编辑刘庆新的报道。这整张冬季特效图完全在于灯光和氛围。设计过程中，我知道这张图后期要经过深加工，所以我花时间准备了3d模型，并在无光条件下很快进行了V-ray基础渲染。相对于前三张图，因为细节和角度，我可以胸有成竹地说这张就是冬景图。从基础渲染到最后的成品图的变化很明显，可以说是一个极端。下面就介绍了这个变化过程。

For thiswinter special #4, it was all about the lighting and atmosphere. Going into this, I knew the illustration was going to be heavily post processed so I spent little time preparing the 3d model and just kicked out a quick V-ray base rendering with no lights.  This has been my most ambitious winter scene yet as compared to the last three seen here because of the detail and view angle. The transformation from the base rendering to the final illustration was extreme, which is outlined below.


1. Base Rendering/基础渲染

基础渲染非常不合逻辑，但是，我只是采用柔和阴影和一些基本的纹理进行渲染。

The base rendering was pretty brutal. However, I was just looking for a rendering with soft shadows and some basic texture information.


2. Clay Rendering/灰度渲染

为了使图看起来更接近冬景，我降低颜色的饱和度，在地平面增加灰度渲染，这样就会呈现出来地面上有雪的景象，所以在Photoshop顶部雪的纹理中选择灰色渲染作为基础确实是一个好办法。除了景里所有材料被无光泽的灰色纹理替代，灰色渲染依然作为基本渲染。

To get the image closer to a winter scene, I desaturated the colors and added a clay rendering to the ground plane. This scene will have snow on the ground so using a clay rendering acts as a good base to Photoshopsnowy textures on top of. A clay rendering is the same as a typical rendering except that all materials in the scene are replaced by a simple matte gray texture. I have a tutorial explaining how to create a clay rendering using Kerkythea, seen HERE.


3. Texturing the Ground Plane/为地平面创建纹理

我上一篇文章中关于纹理的讨论，都是为这一步做准备的。我在网上搜集了雪中的轮胎印儿、脚印纹理，然后，很小心地添加上地面上灰色渲染图的顶层。因为它们是黑色的和白色雪景，不用去除任何元素，我只需要纹理的黑色部分，所以我设置图层混合模式为“叠加”。

As discussed in my last post, it’s all about the textures and that is what I focused on for this step. I combed through the internet looking for textures of tire tracks, foot prints in snow, and snow covered plants. I then slowly layered them on top of the clay rendered ground plane. Because they are black and white snow scenes, I didn’t need to cut anything out. I only needed the dark part of the textures so I just set the layer blend modes to “Multiply”.


4. Trees/树渲染

说起来很奇怪，这一步却进行得很快。在雪白色的背景下，很容易找到冬天的树的图。在上面步骤的基础上，也无需去除元素。我只需要黑色的树木图，所以我将图层混合模式设为“叠加”，这样，不用背景的树木图就生成了。

Oddly enough, this step went fast. It is very easy to find winter trees with snowy white backgrounds. As with the above step, no cutting was needed. I only need the dark parts of the tree images so I set the layer blend mode to “Multiply” which gave me trees without the backgrounds. Nailed it.


5. Fog/雾渲染

这一步产生了巨大的变化。我做渲染做得越多就越能体会到这些场景渲染强大的功效。这是经过多次实验的，并不是用一个教程就能解释的容易的事，因为每一件事都是很微妙的。我试图用一个教程来展示，随后我会下载下来给大家看。在整张图上我也增加了一个蓝色涂层。

This step is where the image makes a huge mood shift. The more I create visualization, the more I realize the power of fog/haze/atmosphere. It’s something that has taken lots of practice and not the easiest thing to explain in a tutorial because everything is so subtle. I have attempted a tutorial in the past found HERE  though I am probably due for an update soon. I also added a blue color overlay over the entire image.


6. Building Lights/建筑灯光渲染

给图中建筑提供灯光照明的设计让整张图突显了焦点。这样我的设计比其周围建筑环境更显眼，给设计图带来层次感和神秘感。

Lighting up the architecture provided an opportunity to bring the focus of the image to my design. I therefore lit my design much brighter than the surrounding context bringing hierarchy and drama to the illustration. A tutorial for manually lighting a building can be found here.


7. Ground Plane Lights and Details/地面灯光和细节渲染

我需要让地面有生机和活力，所以我在设计图的地面上插入了一些行人、汽车灯光条纹，因为这是在冬天，所以还增加了一些树灯。我很小心，避免此类渲染过度，因为我不想喧宾夺主。

I needed to activate the ground plane so I inserted some people, car light streaks, and because this is the winter special, some tree lights. I was careful not to overdo it because I didn’t want to draw too much attention away from the architecture.


8. Color Editing/编辑颜色

对于我来说，整张图看起来太偏灰色了，我调整饱和度使其更蓝。又增加了一点正在下雪的效果，看上去更有冬景的感觉。

The illustration was coming off too gray for my taste so I tweaked the colors to be more saturated and blue. I also added a little snow falling just to bring home the winter scene feel.

出处：本文译自visualizingarchitecture.com/，转载请注明出处。