This repository contains a very simple toon lit shader example, to help people writing their first custom toon lit shader in URP.

This shader's default result(without editing material params) = the following picture's left & center characters,

While the character on the right is using the full version(not simplified) of this shader.

Because this toon lit shader aims to help people learning shader writing in URP, it is an extremely simplified version of the original one (I removed 80% of my original code, while just keeping only the most useful & easy to understand sections), to make sure everyone can understand the shader code easily.

At the end I simplified it too much, so it is now a "How to write your first custom lit shader in URP" example, instead of a good looking toon lit shader example (lots of toon lit tricks are not included in this shader, for simplicity reason).

Lots of my shader friends are looking for a toon lit example shader in URP (not Shader Graph), I want them to switch to URP with me (instead of staying in built-in RP), so I decided to provide a simple enough URP toon lit shader example.

URP Standard Lit(Left) vs our shader(Right)

Apply our shader to different models

Unlit______________________________________________________________________________

vs our shader______________________________________________________________________

Apply our shader to another model (2020-2 early version screen shots) (2020-3 early version screen shots)

(2020-3 lastest version screen shots) https://youtu.be/IP293mAmBCk

1. Clone all .shader & .hlsl files into your URP project.
2. Put these files inside the same folder.
3. Change your character's material's shader to "SimpleURPToonLitExample(With Outline)"
4. make sure atleast _BaseMap(albedo) is assigned
5. setup DONE, you can now test your character with light probe/directional light/point light/spot light
6. edit the material properties to see how the render result changes
7. Most important: open these shader files, spend some time reading it, you will understand how to write custom lit shader in URP very quickly
8. Most important: open "SimpleURPToonLitOutlineExample_LightingEquation.hlsl", edit it, experiment with your own toon lighting equation ideas, which is the key part of toon lit shader!

For simplicity reason, I removed most of the features from the original shader (deleted 80% of the original shader package), else this shader will be way too complex for reading & learning. The removed features are:

• face sphere proxy normal & direction proxy normal (fixing face ugly normals, very important)
• smooth outline normal auto baking (fixing ugly outlines, very important)
• constant outline fix for fov and distance to camera (outline looks correct in any situation, very important)
• hair "angel ring" reflection
• character bounding sphere proxy normal
• rim light
• specular lighting (GGX)
• HSV control shadow & outline color
• 2D mouth renderer
• stencil local hair shadow on face
• depth offset for eye rendering over hair
• most of the extra texture input options like AO, specular, normal map...
• LOTS of sliders to control lighting, final color & outline

We don't have ETA now, we are still working on it, here are some videos about the original toon lit shader:

• https://youtu.be/uVI_QOioER4
• https://youtu.be/YtAiCHBvZr0
• https://youtu.be/QWB060rVjFI
• https://youtu.be/URVgKT5c3PM
• https://youtu.be/6Gx0LxByfWk
• https://youtu.be/IP293mAmBCk
• https://youtu.be/n_bFQ9GNhcM (current)

The easiest way to get a character model is downloading Unity-Chan in the assetstore.

Also, here are some websites that can download models(If the creator allows it)

• https://3d.nicovideo.jp/
• https://hub.vroid.com/

if you downloaded a .pmx file, use this to convert it to .fbx & prefab directly inside unity

MMD4Mecanim (Beta) http://stereoarts.jp/

if you downloaded a .vrm file, use this to convert it to .fbx & prefab directly inside unity

UniVRM https://github.com/vrm-c/UniVRM

• URP 7.2.1 or above
• Unity 2019.3 or above