URP and Builtin

Teo Dutra's From Built-in To URP

URP

include

Content	Built-in	URP
Core	Unity.cginc	com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl
Light	AutoLight.cginc	com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl
Shadows	AutoLight.cginc	com.unity.render-pipelines.universal/ShaderLibrary/Shadows.hlsl
Surface shaders	Lighting.cginc	None, but you can find a side project for this here

Variant Keyword

https://blogs.unity3d.com/2018/05/14/stripping-scriptable-shader-variants/


_MAIN_LIGHT_SHADOWS
_MAIN_LIGHT_SHADOWS_CASCADE
_ADDITIONAL_LIGHTS_VERTEX
_ADDITIONAL_LIGHTS
_ADDITIONAL_LIGHT_SHADOWS
_SHADOWS_SOFT
_MIXED_LIGHTING_SUBTRACTIVE

Macro

built-in	URP
UNITY_PROJ_COORD (a)	없음, 대신 a.xy / a.w 사용
UNITY_INITIALIZE_OUTPUT(type, name)	ZERO_INITIALIZE (type, name)

Shadow

Packages/com.unity.render-pipelines.universal/ShaderLibrary/Shadows.hlsl

Built-in	URP
UNITY_DECLARE_SHADOWMAP(tex)	TEXTURE2D_SHADOW_PARAM(textureName, samplerName)
UNITY_SAMPLE_SHADOW(tex, uv)	SAMPLE_TEXTURE2D_SHADOW(textureName, samplerName, coord3)
UNITY_SAMPLE_SHADOW_PROJ(tex, uv)	SAMPLE_TEXTURE2D_SHADOW(textureName, samplerName, coord4.xyz/coord4.w)
TRANSFER_SHADOW	TransformWorldToShadowCoord
UNITY_SHADOW_COORDS(x)	x
SHADOWS_SCREEN	x
	GetShadowCoords

Fog

com.unity.render-pipelines.universal/ShaderLibrary/ShaderVariablesFunctions.hlsl

Built-in	URP
UNITY_TRANSFER_FOG(o, outpos)	o.fogCoord = ComputeFogFactor(clipSpacePosition.z);
UNITY_APPLY_FOG(coord, col)	color = MixFog(color, i.fogCoord);
UNITY_FOG_COORDS(x)	x

Texture/Sampler Declaration Macros

Built-in	URP
UNITY_DECLARE_TEX2D(name)	TEXTURE2D(textureName); SAMPLER(samplerName);
UNITY_DECLARE_TEX2D_NOSAMPLER(name)	TEXTURE2D(textureName);
UNITY_DECLARE_TEX2DARRAY(name)	TEXTURE2D_ARRAY(textureName); SAMPLER(samplerName);
UNITY_SAMPLE_TEX2D(name, uv)	SAMPLE_TEXTURE2D(textureName, samplerName, coord2)
UNITY_SAMPLE_TEX2D_SAMPLER(name, samplername, uv)	SAMPLE_TEXTURE2D(textureName, samplerName, coord2)
UNITY_SAMPLE_TEX2DARRAY(name, uv)	SAMPLE_TEXTURE2D_ARRAY(textureName, samplerName, coord2, index)
UNITY_SAMPLE_TEX2DARRAY_LOD(name, uv, lod)	SAMPLE_TEXTURE2D_ARRAY_LOD(textureName, samplerName, coord2, index, lod)

Important to note that SCREENSPACE_TEXTURE has become TEXTURE2D_X. If you are working on some screen space effect for VR in Single Pass Instanced or Multi-view modes, you must declare the textures used with TEXTURE2D_X. This macro will handle for you the correct texture (array or not) declaration. You also have to sample the textures using SAMPLE_TEXTURE2D_X and use UnityStereoTransformScreenSpaceTex for the uv.

Helper

Built-in	URP
fixed Luminance (fixed3 c)	Luminance	com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl
fixed3 DecodeLightmap (fixed4 color)	DecodeLightmap	com.unity.render-pipelines.core/ShaderLibrary/EntityLighting.hlsl
float4 EncodeFloatRGBA (float v)	X
float DecodeFloatRGBA (float4 enc)	X
float2 EncodeFloatRG (float v)	X
float DecodeFloatRG (float2 enc)	X
float2 EncodeViewNormalStereo (float3 n)	X
float3 DecodeViewNormalStereo (float4 enc4)	X

decodeInstructions is used as half4(LIGHTMAP_HDR_MULTIPLIER, LIGHTMAP_HDR_EXPONENT, 0.0h, 0.0h) by URP

Lighting

Built-in	URP
WorldSpaceLightDir	TransformObjectToWorld(objectSpacePosition)	com.unity.render-pipelines.universal/ShaderLibrary/Input.hlsl
ObjSpaceLightDir	TransformWorldToObject(_MainLightPosition.xyz)	com.unity.render-pipelines.universal/ShaderLibrary/Input.hlsl
float3 Shade4PointLights	x

URP -_MainLightPosition.xyz 
URP - half3 VertexLighting(float3 positionWS, half3 normalWS) - com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl
If you want to loop over all additional lights using GetAdditionalLight(...), you can query the additional lights count by using GetAdditionalLightsCount().

Built-in	URP	 
_LightColor0	_MainLightColor	Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Input.hlsl”
_WorldSpaceLightPos0	_MainLightPosition	Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Input.hlsl”
_LightMatrix0	Gone ? Cookies are not supported yet	 
unity_4LightPosX0, unity_4LightPosY0, unity_4LightPosZ0	In URP, additional lights are stored in an array/buffer (depending on platform). Retrieve light information using Light GetAdditionalLight(uint i, float3 positionWS)	Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl”
unity_4LightAtten0	In URP, additional lights are stored in an array/buffer (depending on platform). Retrieve light information using Light GetAdditionalLight(uint i, float3 positionWS)	Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl”
unity_LightColor	In URP, additional lights are stored in an array/buffer (depending on platform). Retrieve light information using Light GetAdditionalLight(uint i, float3 positionWS)	Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl”
unity_WorldToShadow	float4x4 _MainLightWorldToShadow[MAX_SHADOW_CASCADES + 1] or _AdditionalLightsWorldToShadow[MAX_VISIBLE_LIGHTS]	Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Shadows.hlsl

| LIGHTING_COORDS| x| |

Vertex-lit Helper Functions

Built-in	URP
float3 ShadeVertexLights (float4 vertex, float3 normal)	Gone. You can try to use UNITY_LIGHTMODEL_AMBIENT.xyz + VertexLighting(...) For VertexLighting(...) include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl”

A bunch of utilities can be found in “Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl”.

Screen-space Helper Functions

Built-in	URP
float4 ComputeScreenPos (float4 clipPos)	float4 ComputeScreenPos(float4 positionCS) Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/ShaderVariablesFunctions.hlsl”
float4 ComputeGrabScreenPos (float4 clipPos)	Gone.

ComputeScreenPos deprecated - https://github.com/Unity-Technologies/Graphics/pull/2529
GetVertexPositionInputs().positionNDC

Camera Texture


_CameraDepthTexture	Camera.depthTextureMode
_CameraOpaqueTexture	GrabPass

fixed depth = SAMPLE_DEPTH_TEXTURE(texture, sampler, uv);

GrabPass
{
    "_GrabPass"
}
sampler2D _GrabPass
fixed4 fGrapPass = tex2Dproj(_GrabPass, i.screenPosition + 0.5f);

Depth

Built-in URP
LinearEyeDepth(sceneZ) LinearEyeDepth(sceneZ, _ZBufferParams) Include “Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl”
Linear01Depth(sceneZ) Linear01Depth(sceneZ, _ZBufferParams) Include “Packages/com.unity.render-pipelines.core/ShaderLibrary/Common.hlsl”

To use the camera depth texture, include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/DeclareDepthTexture.hlsl” and the _CameraDepthTexture will be declared for you as well as helper the functions SampleSceneDepth(...) and LoadSceneDepth(...).

etc

ShadeSH9(normal) SampleSH(normal) Include “Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl”
unity_ColorSpaceLuminance Gone. Use Luminance() Include “Packages/com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl”

Built-in
PerceptualRoughnessToSpecPower	x
FresnelTerm	x
_SpecColor	x
BlendNormals	x	CommonMaterial.hlsl
DotClamped	x
unity_LightGammaCorrectionConsts_PIDiv4	x
UnityGlobalIllumiation	x

여깃는건 쓰지말것 https://leegoonz.blog/ https://www.alanzucconi.com/tutorials/

https://alexanderameye.github.io/outlineshader https://roystan.net/articles/toon-water.html - 물웅덩이 https://darkcatgame.tistory.com/84 https://www.cyanilux.com/recent/2/

https://github.com/hebory?before=Y3Vyc29yOnYyOpK5MjAyMC0xMS0wOVQyMjo0MToyOCswOTowMM4Oqhfn&tab=stars - https://blog.naver.com/cra2yboy/222236607952

툰쉐이더
- https://musoucrow.github.io/2020/07/05/urp_outline/
- https://kink3d.github.io/blog/2017/10/04/Physically-Based-Toon-Shading-In-Unity
  - https://github.com/Kink3d/kShading/blob/master/Shaders/ToonLit.shader
반사
- https://github.com/Kink3d/kMirrors
모션블러
- https://github.com/Kink3d/kMotion
월드 스페이스노말
- https://github.com/Kink3d/kNormals
Fast Subsurface Scattering in unity
- https://www.alanzucconi.com/2017/08/30/fast-subsurface-scattering-2/
헤어 그림자
- https://zhuanlan.zhihu.com/p/232450616

Bulit-in URP

GammaToLinearSpace Gamma22ToLinear com.unity.render-pipelines.core/ShaderLibrary/Color.hlsl

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