This blog post contains only source code for shaders. Full tutorial is on YouTube.
Simple Alpha Blending Shader
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Shader "Alien TechLAB/Alpha Blending" { Properties { _MainTex("RGBA Texture Image", 2D) = "white" {} } SubShader { Tags {"Queue"="Transparent"} Pass { Blend SrcAlpha OneMinusSrcAlpha Cull Off ZWrite Off ZTest LEqual CGPROGRAM #pragma vertex vert #pragma fragment frag uniform sampler2D _MainTex; struct vertexInput { float4 vertex : POSITION; float4 texcoord : TEXCOORD0; }; struct vertexOutput { float4 pos : SV_POSITION; float4 tex : TEXCOORD0; }; vertexOutput vert(vertexInput input) { vertexOutput output; output.tex = input.texcoord; output.pos = UnityObjectToClipPos(input.vertex); return output; } float4 frag(vertexOutput input) : COLOR { float4 textureColor = tex2D(_MainTex, input.tex.xy); return textureColor; } ENDCG } } } |
Correct Alpha Blending Shader
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Shader "Alien TechLAB/Correct Alpha Blending" { Properties { _MainTex("RGBA Texture Image", 2D) = "white" {} } SubShader { Tags {"Queue"="Transparent"} Pass { Blend SrcAlpha OneMinusSrcAlpha Cull Front ZWrite Off ZTest LEqual CGPROGRAM #pragma vertex vert #pragma fragment frag uniform sampler2D _MainTex; struct vertexInput { float4 vertex : POSITION; float4 texcoord : TEXCOORD0; }; struct vertexOutput { float4 pos : SV_POSITION; float4 tex : TEXCOORD0; }; vertexOutput vert(vertexInput input) { vertexOutput output; output.tex = input.texcoord; output.pos = UnityObjectToClipPos(input.vertex); return output; } float4 frag(vertexOutput input) : COLOR { float4 textureColor = tex2D(_MainTex, input.tex.xy); return textureColor; } ENDCG } Pass { Blend SrcAlpha OneMinusSrcAlpha Cull Back ZWrite Off ZTest LEqual CGPROGRAM #pragma vertex vert #pragma fragment frag uniform sampler2D _MainTex; struct vertexInput { float4 vertex : POSITION; float4 texcoord : TEXCOORD0; }; struct vertexOutput { float4 pos : SV_POSITION; float4 tex : TEXCOORD0; }; vertexOutput vert(vertexInput input) { vertexOutput output; output.tex = input.texcoord; output.pos = UnityObjectToClipPos(input.vertex); return output; } float4 frag(vertexOutput input) : COLOR { float4 textureColor = tex2D(_MainTex, input.tex.xy); return textureColor; } ENDCG } } } |