So I wipped up this shader that disolves an object. The problem is that the shadow of the object is unaffected from the alpha value. How do I fix this. Full code :
Shader "Custom/SwordDistortion" { Properties { _Color("Color", Color) = (1,1,1,1) _MainTex("Albedo (RGB)", 2D) = "white" {} _DissolveScale("Dissolve Progression", Range(0.0, 1.0)) = 0.0 _DissolveTex("Dissolve Texture", 2D) = "white" {} _GlowIntensity("Glow Intensity", Range(0.0, 5.0)) = 0.05 _GlowScale("Glow Size", Range(0.0, 5.0)) = 1.0 _Glow("Glow Color", Color) = (1, 1, 1, 1) _GlowEnd("Glow End Color", Color) = (1, 1, 1, 1) _GlowColFac("Glow Colorshift", Range(0.01, 2.0)) = 0.75 _DissolveStart("Dissolve Start Point", Vector) = (1, 1, 1, 1) _DissolveEnd("Dissolve End Point", Vector) = (0, 0, 0, 1) _DissolveBand("Dissolve Band Size", Float) = 0.25 } SubShader { Tags { "Queue" = "Transparent" "RenderType" = "TransparentCutout" } CGPROGRAM // Physically based Standard lighting model, and enable shadows on all light types #pragma surface surf Standard addshadow alpha:fade #pragma vertex vert // using shader model 4.6 for even nicer lighting #pragma target 4.6 sampler2D _MainTex ; sampler2D _DissolveTex ; float _DissolveScale; float3 _DissolveStart; float3 _DissolveEnd; float _DissolveBand; float _GlowIntensity; float _GlowScale; float _GlowColFac; fixed4 _Color; fixed4 _Glow; fixed4 _GlowEnd; struct Input { float2 uv_MainTex; float3 dGeometry; }; //Precompute dissolve direction. static float3 dDir = normalize(_DissolveEnd - _DissolveStart); //Precompute gradient start position. static float3 dissolveStartConverted = _DissolveStart - _DissolveBand * dDir; //Precompute reciprocal of band size. static float dBandFactor = 1.0f / _DissolveBand; void vert(inout appdata_full v, out Input o) { UNITY_INITIALIZE_OUTPUT(Input, o); //Calculate geometry-based dissolve coefficient. //Compute top of dissolution gradient according to dissolve progression. float3 dPoint = lerp(dissolveStartConverted, _DissolveEnd, _DissolveScale); //Project vector between current vertex and top of gradient onto dissolve direction. //Scale coefficient by band (gradient) size. o.dGeometry = dot(v.vertex - dPoint, dDir) * dBandFactor; } void surf (Input IN, inout SurfaceOutputStandard o) { fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color; half dBase = -2.0f * _DissolveScale; fixed4 dTex = tex2D(_DissolveTex, IN.uv_MainTex); half dTexRead = dTex.r + dBase; half dFinal = dTexRead + IN.dGeometry; half alpha = clamp(dFinal, 0.0f, 1.0f); //Shift the computed raw alpha value based on the scale factor of the glow. //Scale the shifted value based on effect intensity. half dPredict = (_GlowScale - dFinal) * _GlowIntensity; //Change colour interpolation by adding in another factor controlling the gradient. half dPredictCol = (_GlowScale * _GlowColFac - dFinal) * _GlowIntensity; //Calculate and clamp glow colour. fixed4 glowCol = dPredict * lerp(_Glow, _GlowEnd, clamp(dPredictCol, 0.0f, 1.0f)); glowCol = clamp(glowCol, 0.0f, 1.0f); o.Albedo = c.rgb; o.Alpha = alpha; o.Emission = glowCol; } ENDCG } FallBack "Diffuse" } 