像素化风格是一种特殊的风格化美术效果，表现为像素点大且明显，边缘锐利，通常色彩明丽，给人以活泼复古的感觉。
通过后处理把uv坐标放大数倍后取整，再缩小为原来的大小，就将多个坐标映射到同一采样点，导致像素点增大，实现像素化风格效果。
Shader
Shader "MyShaderTest/3_PixelStyle"{Properties {_MainTex ("Base (RGB)", 2D) = "white" {}_PixelAmount ("Pixel Amount", float) = 50}SubShader{ZTest Always Cull Off ZWrite OffPass{CGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"sampler2D _MainTex;half4 _MainTex_TexelSize;float _PixelAmount;struct v2f{float4 vertex : SV_POSITION;half2 uv : TEXCOORD0;};v2f vert(appdata_img v){v2f o;o.vertex = UnityObjectToClipPos(v.vertex);o.uv = v.texcoord;#if UNITY_UV_STARTS_AT_TOPif (_MainTex_TexelSize.y < 0.0)o.uv.y = 1.0 - o.uv.y;#endifreturn o;}fixed4 frag(v2f i) : SV_Target{fixed uv_X = floor(i.uv.x * _PixelAmount) / _PixelAmount;fixed uv_Y = floor(i.uv.y * _PixelAmount) / _PixelAmount;i.uv = half2(uv_X,uv_Y);fixed4 color = tex2D(_MainTex,i.uv);return fixed4(color.rgb,1);}ENDCG}}FallBack Off}
