Outline effect as post process – tutorial
In this tutorial I will present a way of creating outline effect for meshes inside UE4. There are two popular methods of creating outline/stroke effect around objects in the game:
- Render mesh twice. Draw first mesh with a standard material and then draw second mesh with slightly higher scale and emissive material.
- Add outline to objects in post-process using edge detection
I’ll focus on the second method, as it requires very little effort to integrate it into existing projects. This tutorial assumes, you are familiar with basics of Unreal Engine 4 and it’s systems (material editor in particular). If you wish to fully understand how to implement edge detection algorithm as UE4 material, some basic image processing knowledge will be useful.