This repository contains the source code for a deferred renderer Sobel Outline post-processing effect for Unity.

There is an accompanying article,

• https://www.vertexfragment.com/ramblings/unity-postprocessing-sobel-outline/

which provides a step-by-step tutorial on how the effect was created.

It should be noted that this project is for demonstration purposes only, and there is no guarantess of its correctness. This project may see occasional future updates to support new Unity or package versions or bug fixes.

The code was written against:

• Unity v2020.2.0f1
• Post Processing v2.3.0

Sometimes you don't want the outlines affecting certain geometry. One way this can be done is by setting signals in the sampled buffers.

Personally, I have gone about this two different ways:

1. Using a secondary depth buffer to render excluded geometry to, combined with ShaderLab tags. See the OutlineOcclusion related objects in the project (C# class, shader, material).
2. Setting a signal in the deferred renderer G-Buffer. Personally have done this by setting the world normal .w to 0.0 and interpreting it in the Sobel shader. This is not demonstrated in the example project.

Any questions or comments may be directed to the contact information found here.