This is a custom shader in Unity, it is a 3-colored gradient shader:
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'Shader "CustomShaders/ThreeColorsGradientShader" { Properties { [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {} _ColorTop ("Top Color", Color) = (1,1,1,1) _ColorMid ("Mid Color", Color) = (1,1,1,1) _ColorBot ("Bot Color", Color) = (1,1,1,1) _Middle ("Middle", Range(0.001, 0.999)) = 1 } SubShader { Tags {"Queue"="Transparent""IgnoreProjector"="True""RenderType"="Transparent"} LOD 200 ZWrite Off Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" fixed4 _ColorTop; fixed4 _ColorMid; fixed4 _ColorBot; float _Middle; struct v2f { float4 pos : SV_POSITION; float4 texcoord : TEXCOORD0; }; v2f vert (appdata_full v) { v2f o; o.pos = UnityObjectToClipPos (v.vertex); o.texcoord = v.texcoord; return o; } fixed4 frag (v2f i) : COLOR { fixed4 c = lerp(_ColorBot, _ColorMid, i.texcoord.y / _Middle) * step(i.texcoord.y, _Middle); c += lerp(_ColorMid, _ColorTop, (i.texcoord.y - _Middle) / (1 - _Middle)) * (1 - step(i.texcoord.y, _Middle)); //c.a = 1; return c; } ENDCG } } }After assigning it to a material and used a material on a UIButton, it works as expected, but if i want to change the color alpha of the material (ie. make it transparent), it does NOT respond to those changes.
What's missing in the code?
