You previously learned about the  Blender Internal  renderer. This is the old, original renderer that was included from the earliest days of Blender. However, it is not the only way to render scenes created with Blender.
::之前你已经了解到Blender内部染器. 这是Blender早期的旧版本染器. 然而,它不是用Blender染创建场景的唯一方法.

Beginning with Blender 2.61 came the new  Cycles  renderer. Its most important new feature is  more physically-accurate handling of lighting  in the form of  global illumination . What this means is that Cycles automatically implements subtle indirect-lighting effects, where light can bounce off a diffuse surface and provide some illumination to other diffuse surfaces nearby. And it doesn’t distinguish in its lighting calculations between “lamp” objects and non-lamp objects which have “emissive” materials; in Blender Internal, the latter do not provide any light to other objects, whereas in Cycles they do.
::从Blender 2.61开始,出现了新的Cycles染器.其最重要的新功能是以全局照明的形式更准确地处理照明.这意味着Cycles自动实现微妙的间接照明效果,光可以反弹在分散表面上并为附近的其他分散表面提供一些照明.并且它在照明计算中不区分灯物体和具有辐射材料的非灯物体;在Blender内部,后者不会为其他物体提供任何光,而在Cycles中它们会.

Cycles also offers high-fidelity previews in the interactive 3D view. As it continues to be developed, it will perhaps replace the old Blender Internal renderer someday, but not all the features are there yet for this to happen.
::循环还提供高保真预览在交互式3D视图.随着它的继续开发,它可能会取代旧的混合器内部染器,但并非所有的功能都存在.

See also:
::另见:

播放段落
• Manual  on Cycles.
  ::关于自行车的手册.
播放段落
• Andrew “BlenderGuru” Price’s  Introduction to Cycles .
  ::布伦德师普莱斯的循环介绍.

This is not a complete renderer in itself, but a new addition to the Blender Internal renderer in version 2.67 of Blender. It adds sophisticated options for accentuating edges to produce cartoon-like renders.
::这本身并不是一个完整的染器,而是Blender 2.67版本的Blender内部染器的一个新增.它添加了复杂的边缘突出选择,以产生卡通式染.

See also:
::另见:

播放段落
• Manual  on Freestyle.
  ::免费的手册.
播放段落
• Report  by Libre Graphics World on the origins of Freestyle.
  ::关于自由风格的起源的自由图形世界的报告.

There are also a great number of stand-alone renderer programs, both proprietary and Free Software, around (e.g.  Aqsis ,  LuxRender ,  Octane ,  RenderMan ,  Yafaray ). These have no capability to create or edit 3D models or scenes, they are designed purely to perform rendering on already-created models and scenes. Several of them—particularly the Free Software ones—are supported by addons to allow them to work with Blender almost as conveniently as its built-in renderers.
::另外,还有大量的独立染程序,包括专有和自由软件 (例如Aqsis,LuxRender,Octane,RenderMan,Yafaray).这些程序没有创建或编辑3D模型或场景的能力,它们纯粹是为了在已经创建的模型和场景上进行染.其中一些程序 (特别是自由软件的程序) 支持附加程序,允许它们与Blender几乎与其内置染器一样方便地工作.

Of course, there can be a downside or two to choosing a renderer other than good old Blender Internal.
::选择一个除了老好的Blender Internal之外的染器可能有其它缺点.

One important thing to note when constructing models is that  materials and lighting are renderer-specific . If you have painstakingly set up transparent materials and bump maps and all the rest of it, then decide to switch renderers, you will have to do that work all over again. And you may find that there is no exact one-to-one correspondence between particular features of Blender Internal materials and lights and those supported by the alternative renderer, so you will have to find approximate workarounds.
::建模时要注意的一点是,材料和照明是染器特有的.如果你已经精心设置了透明材料和撞击地图以及其他的所有内容,然后决定切换染器,你将不得不重新完成这项工作.你可能会发现Blender内部材料和灯光的特定特性与替代染器支持的特性之间没有确切的对应,所以你必须找到大致的解决方案.

Of course, the actual geometry of your models remains unaffected.
::您的模型的实际几何结构当然不受影响.

If you are accustomed to hitting  F12  and seeing an image appear after just a few seconds with Blender Internal, using one of these other renderers will likely come as a shock. To get a good-quality render can easily take  10-100 times as long  as with Blender Internal. You can speed things up by choosing lower-quality settings, but then the results tend to be filled with noise and not fit for much more than preview purposes.
::如果您习惯于按F12并看到Blender Internal仅仅几秒钟后出现图像,使用这些其他染器可能会让您感到震惊.获得高质量的染器可能比Blender Internal需要10-100倍的时间.您可以通过选择低质量的设置来加快速度,但结果往往会充满噪音,不适合预览目的.