EN:
The material is used to outline one model. There is just one shader, I will detail those parments:

Outline Color : Outline's color

Outline Factor : The lerp parment of vertice's direction and vertice's normal direction.

Outline Width : Outline's width.

Body Alpha : The body's alpha value, used to controll body's transparancy.

中文:
该材质能绘制模型边框，同时保持模型的透明度，不是基于后处理深度图的描边

Unity AssetStore (免费) 下载链接:https://www.assetstore.unity3d.com/#!/content/86481

支持Unity版本: Unity 5.6.0+

Unity的相关Shader阐述如下:

Outline Color : 描边的颜色

Outline Factor : 订单方向和法向量方向的插值

Outline Width : 边的宽度

Body Alpha : 模型自身的透明度