How can I make a translucent object cast a shadow

try this one

Shader "Transparent/Diffuse with Shadow" { Properties { _Color ("Main Color", Color) = (1,1,1,1) _MainTex ("Base (RGB) Trans (A)", 2D) = "white" {} }

SubShader { Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" } LOD 200 Blend SrcAlpha OneMinusSrcAlpha CGPROGRAM #pragma surface surf Lambert addshadow

 sampler2D _MainTex;
 fixed4 _Color;
 
 struct Input {
     float2 uv_MainTex;
 };
 
 void surf (Input IN, inout SurfaceOutput o) {
     fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
     o.Albedo = c.rgb;
     o.Alpha = c.a;
 }
 ENDCG

}

Fallback "Transparent/VertexLit" }