Shader "UI/SpeckledEffect"
{
    Properties
    {
        _MainTex ("Main Texture", 2D) = "white" {}
        _SpeckleTex ("Speckle Texture", 2D) = "white" {}
        _SpeckleIntensity ("Speckle Intensity", Range(0, 1)) = 0.5
        _Color ("Color Tint", Color) = (1,1,1,1)
    }
    SubShader
    {
        Tags
        {
            "Queue"="Overlay" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane"
        }
        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"

            struct appdata_t
            {
                float4 vertex : POSITION;
                float2 texcoord : TEXCOORD0;
            };

            struct v2f
            {
                float2 texcoord : TEXCOORD0;
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            sampler2D _SpeckleTex;
            float _SpeckleIntensity;
            float4 _Color;

            v2f vert(appdata_t v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.texcoord = v.texcoord;
                return o;
            }

            fixed4 frag(v2f i) : SV_Target
            {
                // Sample the main texture
                fixed4 col = tex2D(_MainTex, i.texcoord) * _Color;
                // Sample the speckle texture and tile it
                fixed4 speckle = tex2D(_SpeckleTex, i.texcoord * 10.0); // Adjust scaling for effect
                // Combine them with speckle affecting the alpha
                col.rgb = lerp(col.rgb, speckle.rgb, _SpeckleIntensity);
                col.a = col.a * (1.0 - _SpeckleIntensity) + speckle.a * _SpeckleIntensity;
                return col;
            }
            ENDCG
        }
    }
    FallBack "UI/Default"
}