Shader "Custom/PlanetShader" {

   Properties
   {
    _MainTex("Texture", 2D) = "white" {}
      _LightTex("Light Text", 2D) = "black" {}
   _SpecTex("Spec Text", 2D) = "white" {}
   _RimColor("Rim Color", Color) = (0.26,0.19,0.16,0.0)
   _SpecularColor("Specular Color", Color) = (0.26,0.19,0.16,0.0)
    _RimPower("Rim Power", Range(0.5,8.0)) = 3.0
    _RimStrenght("Rim Strenght", Range(0.0,10.0)) = 3.0
   }

      SubShader
   {
      Tags { "RenderType" = "Opaque" }
      CGPROGRAM
      #pragma surface surf Lambert [ noambient ]
      struct Input
   {
    float2 uv_MainTex;
    float2 uv_LightTex;
    float2 uv_SpecTex;
    float3 viewDir;
    float3 lightDir;
      };
   sampler2D _MainTex;
   sampler2D _LightTex;
   sampler2D _SpecTex;
   float4 _RimColor;
   float4 _SpecularColor;
   float _RimPower;
   float _RimStrenght;
      void surf (Input IN, inout SurfaceOutput o)
   {
          
    half rim = 1.0 - saturate(dot(normalize(IN.viewDir), o.Normal));
    o.Albedo = tex2D(_MainTex, IN.uv_MainTex).rgb +( _RimColor.rgb * pow(rim, _RimPower))*_RimStrenght;
    o.Specular = _SpecularColor * tex2D(_SpecTex, IN.uv_SpecTex).a;
    o.Emission = tex2D(_LightTex, IN.uv_LightTex).rgb;
   
    
      }
      ENDCG
    }
    Fallback "Diffuse"
  }