Simple Unity 2D Shader

BlurShader.shader

Shader "Unlit/BlurShader"
{
    Properties
    {
       [PerRendererData]  _MainTex ("Texture", 2D) = "white" {}
       _BlurSize ("Blur Size", Float) = 1.0
    }
    SubShader
    {
        Tags {"Queue"="Transparent" "RenderType"="Transparent" }
        LOD 100
        ZWrite Off
		Blend SrcAlpha OneMinusSrcAlpha
			
        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float4 pos : SV_POSITION;
			    half2 uv[5]: TEXCOORD0;                
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            half4 _MainTex_TexelSize;
            float _BlurSize;

            v2f vert (appdata v)
            {
                v2f o;
                o.pos = UnityObjectToClipPos(v.vertex);
                
                //o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                half2 uv = v.uv;
                
                o.uv[0] = uv;
                o.uv[1] = uv + float2(_MainTex_TexelSize.x * 1.0, 0.0) * _BlurSize;
                o.uv[2] = uv - float2(_MainTex_TexelSize.x * 1.0, 0.0) * _BlurSize;
                o.uv[3] = uv + float2(_MainTex_TexelSize.x * 2.0, 0.0) * _BlurSize;
                o.uv[4] = uv - float2(_MainTex_TexelSize.x * 2.0, 0.0) * _BlurSize;
                        
                return o;
            }

            fixed4 frag(v2f i) : SV_Target {
			    float weight[3] = {0.4026, 0.2442, 0.0545};
			
			    fixed3 sum = tex2D(_MainTex, i.uv[0]).rgb * weight[0];
                fixed  a = tex2D(_MainTex, i.uv[0]).a;
    
                for (int it = 1; it < 3; it++) {
                    sum += tex2D(_MainTex, i.uv[it*2-1]).rgb * weight[it];
                    sum += tex2D(_MainTex, i.uv[it*2]).rgb * weight[it];
                }
                
                return fixed4(sum, a);
            }

            ENDCG
        }
    }
}

GrayscaleShader.shader

Shader "Unlit/GrayscaleShader"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
    }
    SubShader
    {
        Tags {"Queue"="Transparent" "RenderType"="Transparent" }
        LOD 100
       

        Pass
        {
            ZWrite Off
		    Blend SrcAlpha OneMinusSrcAlpha
		
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                UNITY_FOG_COORDS(1)
                float4 vertex : SV_POSITION;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 col = tex2D(_MainTex, i.uv);
                
                fixed value = (col.x + col.y + col.z) / 3;
                
                return fixed4(value, value, value, col.a);
                //return col;
            }
            ENDCG
        }
    }
}

MovingTileShader.shader

Shader "Unlit/MovingTileShader"
{
    Properties
    {
       _MainTex ("Texture", 2D) = "white" {}
       _Speed ("Speed", Range(0,5.0)) = 1
    }

    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            
            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

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

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _Speed;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                
                return o;
            }

            float4 finalTexColor(sampler2D tex, float4 st, float time, float2 uv)
			{
				float2 tiling = st.xy;
				float2 offset = float2(time, time);

				return tex2D(tex, uv * tiling + offset);
			}

            fixed4 frag (v2f i) : SV_Target
            {
                float time = _Time.y * _Speed;
                float2 tiling = _MainTex_ST.xy;
				float2 offset = float2(time, time);

				return tex2D(_MainTex, i.uv * tiling + offset);
            }
            ENDCG
        }
    }
}

ShiningShader.shader

Shader "Unlit/ShiningShader"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
        _Speed ("Wave Speed", Range(0.1, 80)) = 5
		    _BoomWeight ("Boom Weight", Range(0, 1)) = 0.5
    }
    SubShader
    {
        Tags {"Queue"="Transparent" "RenderType"="Transparent" }
        LOD 100
       

        Pass
        {
            ZWrite Off
		       Blend SrcAlpha OneMinusSrcAlpha
		
            CGPROGRAM
            // Upgrade NOTE: excluded shader from DX11; has structs without semantics (struct v2f members bloomWeight)
            #pragma exclude_renderers d3d11
            #pragma vertex vert
            #pragma fragment frag
            // make fog work
            #pragma multi_compile_fog

            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f
            {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
                float4 bloomColor : COLOR;
            };

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _Speed;
            float _BoomWeight;

            v2f vert (appdata v)
            {
                v2f o;
                // _Time is a data given by unity 
				float time = _Time * _Speed;

				// the wave information. 
  				float boomValue = (1 - sin(time)) * 0.5 * _BoomWeight;    // RESULT: 0 ~ 1
                o.bloomColor = float4(boomValue, boomValue, boomValue, 0);

                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture
                fixed4 col = tex2D(_MainTex, i.uv);
                
                col += i.bloomColor;
                
                return col;
                //return col;
            }
            ENDCG
        }
    }
}

TileShader.shader

Shader "Unlit/Unlit_TileShader"
{
    Properties
    {
       _MainTex ("Texture", 2D) = "white" {}
    }

    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            
            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

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

            sampler2D _MainTex;
            float4 _MainTex_ST;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                
                return o;
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture                
                fixed4 col = tex2D(_MainTex, i.uv);
              
                // apply fog
                // UNITY_APPLY_FOG(i.fogCoord, col);
                return col;
            }
            ENDCG
        }
    }
}

Unlit_Dither.shader

Shader "Unlit/Unlit_Dither"
{
    Properties
    {
       _MainTex ("Texture", 2D) = "white" {}
       _DitherScale ("Dither Scale", Range(1, 100)) = 50
       _DitherStrength ("Dither Strength", Range(1, 10)) = 3
    }

    SubShader
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            
            #include "UnityCG.cginc"

            struct appdata
            {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

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

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _DitherScale;
            float _DitherStrength;

            v2f vert (appdata v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                
                return o;
            }

            inline float Dither4x4(float2 uv, float resolution) 
            {
                float pattern[16] = {0.0625,0.5625,0.1875, 0.6875,0.8125,0.3125,0.9375,0.4375,0.25,0.75,0.125,0.625,1.0,0.5,0.875,0.375};			
                
                int x = int(fmod(uv.x*resolution, 4));
                int y = int(fmod(uv.y*resolution, 4));

                int index = x + y * 4;
                float limit = 0.0;			
                if (x < 4) { 
                    limit = pattern[index];			
                }

                return limit;
            }



            inline float4 FillPatternColor(fixed4 col, fixed steps, float lum, float limit)
            {
                // Calculate high/low color
                col.rgb = col.rgb*steps;
                fixed3 low = floor(col.rgb)/steps;
                fixed3 high = ceil(col.rgb)/steps;
                col.rgb = (lum < limit ? low : high);			
                return col;
            }

            inline float4 Dither4x4Color(float2 uv, fixed4 col, float resolution) 
            {
                float lu = Luminance(col.rgb);
                float limit = Dither4x4(uv, resolution);
                return FillPatternColor(col, _DitherStrength, lu, limit);
            }

            fixed4 frag (v2f i) : SV_Target
            {
                // sample the texture                
                fixed4 col = tex2D(_MainTex, i.uv);
              
                // apply fog
                // UNITY_APPLY_FOG(i.fogCoord, col);
                return Dither4x4Color(i.uv, col, _DitherScale);
            }
            ENDCG
        }
    }
}