URP Custom Lit shader skeleton.

URP shader skeleton

URP Custom Lit shader skeleton.

This shader that in order to understanding URP lit shader structure and function type.

Shader "URP_PBR_7.12"
{
   
   
    Properties
    {
   
   
		[MainColor] _BaseColor("Albedo Color", Color) = (0.5,0.5,0.5,1)
        [MainTexture] _BaseMap("Albedo", 2D) = "white" {
   
   }
        _BumpMap("Normal Map", 2D) = "bump" {
   
   }
        _BumpScale("Scale", Range(1,2)) = 1.0
		_Smoothness("Roughness", Range(0.0, 1.0)) = 0.5
		[Gamma] _Metallic("Metallic", Range(0.0, 1.0)) = 0.0
		_MetallicGlossMap("MetallicTexture", 2D) = "white" {
   
   }
        _SpecColor("Specular", Color) = (0.2, 0.2, 0.2)
		
		[ToggleOff] _SpecularHighlights("Specular Highlights", Float) = 1.0
		[ToggleOff] _EnvironmentReflections("Environment Reflections", Float) = 1.0
		_OcclusionMap("Occlusion", 2D) = "white" {
   
   }
        _OcclusionStrength("Strength", Range(0.0, 1.0)) = 1.0
		_EmissionColor("Color", Color) = (0,0,0)
		_EmissionMap("Emission", 2D) = "white" {
   
   }
    }


    SubShader
    {
   
   
		
       Tags{
   
   "RenderType" = "Opaque" "RenderPipeline" = "UniversalPipeline" "IgnoreProjector" = "True"}
        LOD 300

		Cull Back
		HLSLINCLUDE
		#pragma target 3.0
		ENDHLSL
		
        Pass
        {
   
   
			
        	Name "ForwardLit"
            Tags{
   
   "LightMode" = "UniversalForward"}

        	Name "Base"
			Blend One Zero
			ZWrite On
			ZTest LEqual
			Offset 0,0
			ColorMask RGBA
        
        	 HLSLPROGRAM
            // Required to compile gles 2.0 with standard SRP library
            // All shaders must be compiled with HLSLcc and currently only gles is not using HLSLcc by default
            #pragma prefer_hlslcc gles
            #pragma exclude_renderers d3d11_9x
            
            // -------------------------------------
            // Material Keywords
            #pragma shader_feature _ALPHATEST_ON
            #pragma shader_feature _ALPHAPREMULTIPLY_ON
            #pragma shader_feature _EMISSION
            #pragma shader_feature _METALLICSPECGLOSSMAP
            #pragma shader_feature _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
            
            #pragma shader_feature _SPECULARHIGHLIGHTS_OFF
            #pragma shader_feature _ENVIRONMENTREFLECTIONS_OFF
            #pragma shader_feature _SPECULAR_SETUP
            #pragma shader_feature _RECEIVE_SHADOWS_OFF

            // -------------------------------------
            // Universal Pipeline keywords
            #pragma multi_compile _ _MAIN_LIGHT_SHADOWS
            #pragma multi_compile _ _MAIN_LIGHT_SHADOWS_CASCADE
            #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
            #pragma multi_compile _ _ADDITIONAL_LIGHT_SHADOWS
            #pragma multi_compile _ _SHADOWS_SOFT
            #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE

            // -------------------------------------
            // Unity defined keywords
            #pragma multi_compile _ DIRLIGHTMAP_COMBINED
            #pragma multi_compile _ LIGHTMAP_ON
            #pragma multi_compile_fog

            //--------------------------------------
            // GPU Instancing
            #pragma multi_compile_instancing

            #pragma vertex vert
        	#pragma fragment frag

        	#include "Packages/com.unity.render-pipelines.universal/Shaders/LitInput.hlsl"
        	#include "Packages/com.unity.render-pipelines.universal/Shaders/LitForwardPass.hlsl"
		    
			
			struct mySurfaceData
            {
   
   
                half3 albedo;
                half3 specular;
                half  metallic;
                half  roughness;
                half3 normalTS;
                half3 emission;
                half  occlusion;
                half  alpha;
            };

            
            struct myInputData
            {
   
   
                float3  positionWS;
                half3   normalWS