Demo 54 - Texture depending normal

Shader "Custom/TextureDependingNormal"
{
    Properties
    {
        _FloorTex ("Floor Texture", 2D) = "white" {}
        _WallTex ("Wall Texture", 2D) = "white" {}
        _CeilTex ("Ceil Texture", 2D) = "white" {}
    }

    SubShader
    {
        Tags { "RenderType"="Opaque" }


        CGPROGRAM
        #pragma surface surf Standard

        struct Input {
            float3 worldNormal;
            float2 uv_FloorTex;
            float2 uv_WallTex;
            float2 uv_CeilTex;
        };

        sampler2D _FloorTex;
        sampler2D _WallTex;
        sampler2D _CeilTex;

        void surf(Input IN, inout SurfaceOutputStandard o) {
            // Floor
            if(IN.worldNormal.y > 0.9)
            {
                o.Albedo = tex2D(_FloorTex, IN.uv_FloorTex).rgb;
            }
            // Ceil
            else if(IN.worldNormal.y < -0.9)
            {
                o.Albedo = tex2D(_CeilTex, IN.uv_CeilTex).rgb;
            }
            // Wall
            else
            {
                o.Albedo = tex2D(_WallTex, IN.uv_WallTex).rgb;
            }
            o.Emission = half3(1, 1, 1) * o.Albedo;
            o.Metallic = 0.0;
            o.Smoothness = 0.5;
        }

        ENDCG
    }
}