unity3d - Unity 3d 环境光不影响广告牌着色器

Question

我有一个广告牌着色器，但问题是无论环境光是黑色还是白色，我的广告牌平面总是很亮。统一环境光是否可能会影响广告牌着色器。请帮忙

Shader "Unlit/Billboard"

{ 属性 { _MainTex ("Texture", 2D) = "white" {} } SubShader { Tags{ "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Transparent" "DisableBatching" = "True" }

    ZWrite Off
    Blend SrcAlpha OneMinusSrcAlpha

    Pass
    {
        CGPROGRAM
        #pragma vertex vert
        #pragma fragment frag
        // make fog work
        #pragma multi_compile_fog

        #include "UnityCG.cginc"

        struct appdata
        {
            float4 vertex : POSITION;
            float2 uv : TEXCOORD0;
        };

        struct v2f
        {
            float2 uv : TEXCOORD0;
            UNITY_FOG_COORDS(1)
            float4 pos : SV_POSITION;
        };

        sampler2D _MainTex;
        float4 _MainTex_ST;
        
        v2f vert (appdata v)
        {
            v2f o;
            o.pos = UnityObjectToClipPos(v.vertex);
            o.uv = v.uv.xy;

            // billboard mesh towards camera
            float3 vpos = mul((float3x3)unity_ObjectToWorld, v.vertex.xyz);
            float4 worldCoord = float4(unity_ObjectToWorld._m03, unity_ObjectToWorld._m13, unity_ObjectToWorld._m23, 1);
            float4 viewPos = mul(UNITY_MATRIX_V, worldCoord) + float4(vpos, 0);
            float4 outPos = mul(UNITY_MATRIX_P, viewPos);

            o.pos = outPos;

            UNITY_TRANSFER_FOG(o,o.vertex);
            return o;
        }
        
        fixed4 frag (v2f i) : SV_Target
        {
            // sample the texture
            fixed4 col = tex2D(_MainTex, i.uv);
            // apply fog
            UNITY_APPLY_FOG(i.fogCoord, col);
            return col;
        }
        ENDCG
    }
}

}

标签： unity3d3dshaderlightambient

Answer 1

顾名思义，“Unlit/Billboard”着色器是未点亮的。这意味着它在渲染时不会考虑灯光。如果您希望广告牌与环境光交互，您需要找到另一个具有此效果的着色器，或者自己修改它。