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Shader "Volund/Standard Scatter (Metallic, Surface)" {
Properties {
_Color("Color", Color) = (1,1,1,1)
_MainTex("Albedo", 2D) = "white" {}
_Cutoff("Alpha Cutoff", Range(0.0, 1.0)) = 0.5
_Glossiness("Smoothness", Range(0.0, 1.0)) = 0.5
[Gamma] _Metallic("Metallic", Range(0.0, 1.0)) = 0.0
_MetallicGlossMap("Metallic", 2D) = "white" {}
_BumpScale("Scale", Float) = 1.0
_BumpMap("Normal Map", 2D) = "bump" {}
_Parallax ("Height Scale", Range (0.005, 0.08)) = 0.02
_ParallaxMap ("Height Map", 2D) = "black" {}
_OcclusionStrength("Strength", Range(0.0, 1.0)) = 1.0
_OcclusionMap("Occlusion", 2D) = "white" {}
_EmissionColor("Color", Color) = (0,0,0)
_EmissionMap("Emission", 2D) = "white" {}
_DetailMask("Detail Mask", 2D) = "white" {}
_DetailAlbedoMap("Detail Albedo x2", 2D) = "grey" {}
_DetailNormalMapScale("Scale", Float) = 1.0
_DetailNormalMap("Normal Map", 2D) = "bump" {}
[Enum(UV0,0,UV1,1)] _UVSec ("UV Set for secondary textures", Float) = 0
// Blending state
[HideInInspector] _Mode ("__mode", Float) = 0.0
[HideInInspector] _SrcBlend ("__src", Float) = 1.0
[HideInInspector] _DstBlend ("__dst", Float) = 0.0
[HideInInspector] _ZWrite ("__zw", Float) = 1.0
// Volund properties
[HideInInspector] _CullMode ("__cullmode", Float) = 2.0
[HideInInspector] _SmoothnessInAlbedo ("__smoothnessinalbedo", Float) = 0.0
_MetaAlbedoDesaturation("Meta Albedo Desaturation", Range (0.0, 1.0)) = 0.0
[HDR] _MetaAlbedoTint("Meta Albedo Tint", Color) = (1.0,1.0,1.0,1.0)
[HDR] _MetaAlbedoAdd("Meta Albedo Add", Color) = (0.0,0.0,0.0,0.0)
Category {
Tags { "RenderType"="Opaque" "PerformanceChecks"="False" }
Blend [_SrcBlend] [_DstBlend]
ZWrite [_ZWrite]
Cull [_CullMode]
// - Physically based Standard lighting model, metallic workflow
// - 'fullforwardshadows' to enable shadows on all light types
// - 'addshadow' to ensure alpha test works for depth/shadow passes
// - 'keepalpha' to allow alpha blended output options
// - Custom vertex function to setup detail UVs as expected by Standard shader,
// and to setup atmospheric scattering.
// - Custom finalcolor function to output controlled final alpha, and to apply
// atmospheric scattering.
// - 'exclude_path:prepass' since we have no use for this legacy path
#pragma surface Surf Standard fullforwardshadows addshadow keepalpha vertex:StandardScatterSurfaceVertex finalcolor:StandardScatterSurfaceFinal exclude_path:prepass
// Standard shader feature variants
#pragma shader_feature _NORMALMAP
#pragma shader_feature _ _ALPHATEST_ON
#pragma shader_feature _METALLICGLOSSMAP
#pragma shader_feature _DETAIL_MULX2
// Standard, but unused in this project
//#pragma shader_feature _EMISSION
//#pragma shader_feature _PARALLAXMAP
// Volund additional variants
#pragma shader_feature SMOOTHNESS_IN_ALBEDO
#pragma multi_compile _ ATMOSPHERICS_DEBUG
// Unused in this project (always set to desired config)
// #pragma multi_compile _ ATMOSPHERICS_OCCLUSION
// #pragma multi_compile _ ATMOSPHERICS_OCCLUSION_EDGE_FIXUP
#pragma multi_compile _ ATMOSPHERICS FOG_EXP2
// Include scattering functions
#include "../Code/AtmosphericScattering.cginc"
struct ScatterInput
float4 texcoord;
half3 viewDir;
float vface : VFACE;
#if !defined(ATMOSPHERICS) && defined(FOG_EXP2)
#define fogCoord scatterCoords1.x
#define Input ScatterInput
// Include all the Standard shader surface helpers
#include "UnityStandardSurface.cginc"
void StandardScatterSurfaceVertex (inout appdata_full v, out Input o) {
StandardSurfaceVertex(v, o);
SURFACE_SCATTER_TRANSFER(mul(_Object2World, v.vertex).xyz, o);
#if !defined(ATMOSPHERICS) && defined(FOG_EXP2)
void StandardScatterSurfaceFinal(Input IN, SurfaceOutputStandard o, inout half4 color) {
StandardSurfaceFinal(IN, o, color);
#if !defined(ATMOSPHERICS) && defined(FOG_EXP2)
UNITY_APPLY_FOG(IN.fogCoord, color.rgb);
uniform float _CullMode;
uniform float _MetaAlbedoDesaturation;
uniform float3 _MetaAlbedoTint;
uniform float3 _MetaAlbedoAdd;
// Our main surface entry point
void Surf(Input IN, inout SurfaceOutputStandard o) {
StandardSurface(IN, o);
// Experimental normal flipping
if(_CullMode < 0.5f)
o.Normal.z *= IN.vface;
// Optionally sample smoothness from albedo texture alpha channel instead of sg texture
o.Smoothness = tex2D(_MainTex, IN.texcoord.xy).a;
// Apply additional color controls to meta pass albedo output.
o.Albedo = lerp(o.Albedo, Luminance(o.Albedo).rrr, _MetaAlbedoDesaturation) * _MetaAlbedoTint + _MetaAlbedoAdd;
SubShader {
LOD 400
// Use shader model 5.0 to get access to gather4 instruction (Unity has no 4.1 profile)
#pragma target 5.0
#pragma only_renderers d3d11
SubShader {
LOD 300
// Use shader model 3.0 to get nicer looking lighting (PBS toggles internally on shader model)
#pragma target 3.0
#pragma only_renderers d3d9 opengl
CustomEditor "VolundMultiStandardShaderGUI"
FallBack "Diffuse"

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Paxilon commented Jul 13, 2016

Hi Robert. I really love the whole Atmosphere Scattering Tool for Unity! Really well done! I am wondering if it is possible to make Transparency, Emission and Parallax working with this shader. When I try to admit it the shader gets really slow. It seems that reflections in deffered mode also dont work when I use transparent oder fade.

//#pragma shader_feature _EMISSION
//#pragma shader_feature _PARALLAXMAP

Is there a workaroud how to speed up the compilation process? Thanks in advance!

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