StarRailNPRShader

Important

Please read this file before using the shaders!!!

Fan-made shaders for Unity URP attempting to replicate the shading of Honkai: Star Rail. The shaders are not 100% accurate because this project is not a reverse engineering - what I do is to replicate the in-game looks to the best of my ability.

↑↑↑ My Wife ↑↑↑

↑↑↑ Also My Wife ↑↑↑

↑↑↑ Our Mum ↑↑↑

Shaders included

Honkai Star Rail/Character/Body
Honkai Star Rail/Character/Body (Transparent)
Honkai Star Rail/Character/EyeShadow
Honkai Star Rail/Character/Face
Honkai Star Rail/Character/Hair

The rendering of character takes advantage of MRT whose pass is always executed after UniversalForward. As a result, when it comes to transparent objects, the rendering result may go wrong.

*To maintain this project more easily, I won't rewrite the whole render pipeline. You can do it yourself.

Extra features

Asset preprocess:

Automatically smooth the normals of character models and store them into tangents. The file name of the model must match pattern ^Avatar_.+_00$, e.g., Avatar_Kafka_00.
Automatically process textures (if you haven't changed the file names after ripping them).

PostProcessing:

Custom bloom using the method shared by Jack He in Unite 2018.
Custom ACES tonemapping. The formula is

$$f(x)=\frac{x(ax+b)}{x(cx+d)+e}$$

where $a,b,c,d,e$ are all parameters.

Requirements

Basic knowledge of anime style rendering.
Unity 2022.3 (Recommended).
Universal RP 14.0 (Recommended) or higher.
My ShaderUtilsForSRP package.
(Optional) Newtonsoft Json package 3.2.1 or higher.

Newtonsoft Json is used by a custom editor util called Game Material Inspector which can help us read Material JSON files ripped by a certain tool. To enable that util, add the scripting define symbol PACKAGE_NEWTONSOFT_JSON in player settings after importing Newtonsoft Json package.

Guide

Use linear color space instead of gamma.
HDR should be enabled.
Depth priming must be disabled.
Depth texture must be enabled and generated by a depth prepass.
Rendering path must be forward currently.
Renderer Feature StarRailForward must be added to the renderer.
Make good use of the extra features mentioned above! They are important.
Reset the material after changing its shader.

For MMD models

Some extra steps must be done:

Change Model Type to MMD on each material.
Add component SyncMMDHeadBone to the GameObject to which SkinnedMeshRenderer is attached.

Note that MMD models do not contain some detailed information so the final rendering result may not fully meet your expectation.

Special thanks

miHoYo
Related posts on Zhihu
Related videos on bilibili
°Nya°222

FAQ

Why outlines/rim-lights do not work?

Change the Model Scale at the top of the material.

itsjustfine / starrailnprshader Goto Github PK