diff --git a/spine-unity/Assets/Spine/Runtime/spine-unity/Modules/Shaders/Spine-Special-Skeleton-Grayscale.shader b/spine-unity/Assets/Spine/Runtime/spine-unity/Modules/Shaders/Spine-Special-Skeleton-Grayscale.shader
new file mode 100644
index 000000000..112c46ebb
--- /dev/null
+++ b/spine-unity/Assets/Spine/Runtime/spine-unity/Modules/Shaders/Spine-Special-Skeleton-Grayscale.shader
@@ -0,0 +1,105 @@
+// - Unlit
+// - Premultiplied Alpha Blending (Optional straight alpha input)
+// - Double-sided, no depth
+
+Shader "Spine/Special/Skeleton Grayscale" {
+	Properties {
+		_GrayPhase ("Phase", Range(0, 1)) = 1
+		[NoScaleOffset] _MainTex ("MainTex", 2D) = "white" {}
+		_Cutoff ("Shadow alpha cutoff", Range(0,1)) = 0.1
+		[Toggle(_STRAIGHT_ALPHA_INPUT)] _StraightAlphaInput("Straight Alpha Texture", Int) = 0
+	}
+	SubShader {
+		Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
+		Blend One OneMinusSrcAlpha
+		Cull Off
+		ZWrite Off
+		Lighting Off
+
+		Pass {
+			CGPROGRAM
+			#pragma shader_feature _ _STRAIGHT_ALPHA_INPUT
+			#pragma vertex vert
+			#pragma fragment frag
+			#include "UnityCG.cginc"
+			sampler2D _MainTex;
+			float _GrayPhase;
+
+			struct VertexInput {
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+				float4 vertexColor : COLOR;
+			};
+
+			struct VertexOutput {
+				float4 pos : SV_POSITION;
+				float2 uv : TEXCOORD0;
+				float4 vertexColor : COLOR;
+			};
+
+			VertexOutput vert (VertexInput v) {
+				VertexOutput o = (VertexOutput)0;
+				o.uv = v.uv;
+				o.vertexColor = v.vertexColor;
+				o.pos = UnityObjectToClipPos(v.vertex);
+				return o;
+			}
+
+			float4 frag (VertexOutput i) : COLOR {
+				float4 rawColor = tex2D(_MainTex,i.uv);
+				float finalAlpha = (rawColor.a * i.vertexColor.a);
+
+				#if defined(_STRAIGHT_ALPHA_INPUT)
+				rawColor.rgb *= rawColor.a;
+				#endif
+
+				rawColor.rgb *= i.vertexColor.rgb;
+
+				float3 finalColor = lerp(rawColor.rgb, dot(rawColor.rgb, float3(0.3, 0.59, 0.11)), _GrayPhase);
+				return fixed4(finalColor, finalAlpha);
+			}
+			ENDCG
+		}
+
+		Pass {
+			Name "Caster"
+			Tags { "LightMode"="ShadowCaster" }
+			Offset 1, 1
+			ZWrite On
+			ZTest LEqual
+
+			Fog { Mode Off }
+			Cull Off
+			Lighting Off
+
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			#pragma multi_compile_shadowcaster
+			#pragma fragmentoption ARB_precision_hint_fastest
+			#include "UnityCG.cginc"
+			sampler2D _MainTex;
+			fixed _Cutoff;
+
+			struct VertexOutput { 
+				V2F_SHADOW_CASTER;
+				float2 uv : TEXCOORD1;
+			};
+
+			VertexOutput vert (appdata_base v) {
+				VertexOutput o;
+				o.uv = v.texcoord;
+				TRANSFER_SHADOW_CASTER(o)
+				return o;
+			}
+
+			float4 frag (VertexOutput i) : COLOR {
+				fixed4 texcol = tex2D(_MainTex, i.uv);
+				clip(texcol.a - _Cutoff);
+				SHADOW_CASTER_FRAGMENT(i)
+			}
+			ENDCG
+		}
+	}
+	FallBack "Diffuse"
+}
\ No newline at end of file
diff --git a/spine-unity/Assets/Spine/Runtime/spine-unity/Modules/Shaders/Spine-Special-Skeleton-Grayscale.shader.meta b/spine-unity/Assets/Spine/Runtime/spine-unity/Modules/Shaders/Spine-Special-Skeleton-Grayscale.shader.meta
new file mode 100644
index 000000000..6db4577e4
--- /dev/null
+++ b/spine-unity/Assets/Spine/Runtime/spine-unity/Modules/Shaders/Spine-Special-Skeleton-Grayscale.shader.meta
@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: ea7e7c05f36541b4bb280f98ebda8ba1
+timeCreated: 1492385797
+licenseType: Free
+ShaderImporter:
+  defaultTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: