New standard shader with flipbook animation

Assets/dbl-world/shaders/minecraft/StandardSurf.shader

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+Shader "Custom/StandardSurf"
+{
+    Properties
+    {
+        _Color("Color", Color) = (1,1,1,1)
+        _MainTex("Albedo (RGBA)", 2D) = "white" {}
+        _Glossiness("Smoothness", Range(0,1)) = 0.5
+        _Metallic("Metallic", Range(0,1)) = 0.0
+
+        [NoScaleOffset]_DiffuseArray("Transparent Albedo (RGBA)", 2DArray) = "" {}
+        _FlipbookFPS("Flipbook FPS", Integer) = 30
+        _FlipbookFrames("Flipbook Frames", Integer) = 30
+    }
+
+    SubShader
+    {
+        Tags { "RenderType" = "Transparent" "Queue" = "Transparent" }
+        LOD 200
+
+        Blend SrcAlpha OneMinusSrcAlpha
+        ZWrite Off
+        Cull Back
+
+        CGPROGRAM
+        // Physically based Standard lighting model, and enable shadows on all light types
+        #pragma surface surf Standard fullforwardshadows alpha:fade
+
+        // Use shader model 3.0 target, to get nicer looking lighting
+        #pragma target 3.0
+
+        UNITY_DECLARE_TEX2DARRAY(_DiffuseArray);
+
+        int _FlipbookFPS;
+        int _FlipbookFrames;
+
+        sampler2D _MainTex;
+        half _Glossiness;
+        half _Metallic;
+        fixed4 _Color;
+
+        struct Input
+        {
+            float2 uv_MainTex;
+        };
+
+        // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
+        // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
+        // #pragma instancing_options assumeuniformscaling
+        UNITY_INSTANCING_BUFFER_START(Props)
+        // put more per-instance properties here
+        UNITY_INSTANCING_BUFFER_END(Props)
+
+        void surf(Input IN, inout SurfaceOutputStandard o)
+        {
+            // Common UV for all texture arrays
+            float frame = fmod(floor(_Time.y * _FlipbookFPS), _FlipbookFrames);  // Cyclic frame value
+            float3 uvw = float3(IN.uv_MainTex, frame);
+
+            float4 diff = UNITY_SAMPLE_TEX2DARRAY(_DiffuseArray, uvw) * _Color;
+            o.Albedo = diff.rgb;
+            o.Alpha = diff.a;
+
+            // Metallic and smoothness come from slider variables
+            o.Metallic = _Metallic;
+            o.Smoothness = _Glossiness;
+            // o.Alpha = c.a;
+        }
+
+        ENDCG
+    }
+
+    FallBack "Standard"
+}

Assets/dbl-world/shaders/minecraft/StandardSurf.shader.meta

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+fileFormatVersion: 2
+guid: f97431011a6300f40b325e5cc8ac9f3d
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  userData: 
+  assetBundleName: 
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