解决方案来自::https://killertee.wordpress.com/2018/02/28/experiments-with-unity-shader-graph-and-scriptable-render-pipeline/
打开Package Manager下载如图包:
然后创建一个LightWeight Pipeline Assets (Create/Rendering/LightWeight Pipeline Assets)
依次点击Edit/Project Settings/Graphics 将刚才创建的LightWeight Pipeline Assets拖入如图地方就OK了