hi guys, currently I am facing an issue where by the sprite mesh is not rendering the alpha accurately on the Spine-skeleton-tint. This issues is not present in the Spine-skeleton-lit version.
What should I do to fix this issue?
// Spine/Skeleton Tint
// - Two color tint
// - unlit
// - Premultiplied alpha blending (Optional straight alpha input)
// - No depth, no backface culling, no fog.
Shader "Spine/Skeleton Tint" {
Properties {
_Color ("Tint Color", Color) = (1,1,1,1)
_Black ("Black Point", Color) = (0,0,0,0)
[NoScaleOffset] _MainTex ("MainTex", 2D) = "black" {}
[Toggle(_STRAIGHT_ALPHA_INPUT)] _StraightAlphaInput("Straight Alpha Texture", Int) = 0
_Cutoff ("Shadow alpha cutoff", Range(0,1)) = 0.1
[HideInInspector] _StencilRef("Stencil Reference", Float) = 1.0
[Enum(UnityEngine.Rendering.CompareFunction)] _StencilComp("Stencil Comparison", Float) = 8 // Set to Always as default
}
SubShader {
Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
Fog { Mode Off }
Cull Off
ZWrite Off
Blend One OneMinusSrcAlpha
Lighting Off
Stencil {
Ref[_StencilRef]
Comp[_StencilComp]
Pass Keep
}
Pass {
CGPROGRAM
#pragma shader_feature _ _STRAIGHT_ALPHA_INPUT
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
sampler2D _MainTex;
float4 _Color;
float4 _Black;
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;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = v.uv;
o.vertexColor = v.vertexColor * float4(_Color.rgb * _Color.a, _Color.a); // Combine a PMA version of _Color with vertexColor.
return o;
}
float4 frag (VertexOutput i) : SV_Target {
float4 texColor = tex2D(_MainTex, i.uv);
#if defined(_STRAIGHT_ALPHA_INPUT)
texColor.rgb *= texColor.a;
#endif
return (texColor * i.vertexColor) + float4(((1-texColor.rgb) * _Black.rgb * texColor.a[i]_Color.a[/i]i.vertexColor.a), 0);
}
ENDCG
}
Pass {
Name "Caster"
Tags { "LightMode"="ShadowCaster" }
Offset 1, 1
ZWrite Off
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;
float4 uvAndAlpha : TEXCOORD1;
};
VertexOutput vert (appdata_base v, float4 vertexColor : COLOR) {
VertexOutput o;
o.uvAndAlpha = v.texcoord;
o.uvAndAlpha.a = vertexColor.a;
TRANSFER_SHADOW_CASTER(o)
return o;
}
float4 frag (VertexOutput i) : SV_Target {
fixed4 texcol = tex2D(_MainTex, i.uvAndAlpha.xy);
clip(texcol.a * i.uvAndAlpha.a - _Cutoff);
SHADOW_CASTER_FRAGMENT(i)
}
ENDCG
}
}
}