Hello everyone.
I try to make a plane invisible (for AR) that can receive shadows but with holes where water (for a swimming pool should be deplayed).
I tried almost everything but it persist to not mix both.
My shader for the plane is :
Shader "Mask/Shadows"
{
Properties
{
_ShadowIntensity("Shadow Intensity", Range(0, 1)) = 0.6
}
SubShader
{
Tags{ "Queue" = "AlphaTest" }
Pass
{
Stencil{ Ref 1 Comp Equal Pass Replace }
Tags{ "LightMode" = "ForwardBase" }
Cull Back
Blend SrcAlpha OneMinusSrcAlpha
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma multi_compile_fwdbase
#include "UnityCG.cginc"
#include "AutoLight.cginc"
uniform float _ShadowIntensity;
struct v2f
{
float4 pos : SV_POSITION;
LIGHTING_COORDS(0,1)
};
v2f vert(appdata_base v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
TRANSFER_VERTEX_TO_FRAGMENT(o);
return o;
}
fixed4 frag(v2f i) : COLOR
{
float attenuation = LIGHT_ATTENUATION(i);
return fixed4(0,0,0,(1 - attenuation)*_ShadowIntensity);
}
ENDCG
}
}
SubShader
{
Tags{ "RenderType" = "Opaque" }
// Pass to render object as a shadow caster
Pass
{
Name "ShadowCaster"
Tags{ "LightMode" = "ShadowCaster" }
Fog{ Mode Off }
ZWrite On ZTest LEqual Cull Off
Offset 1, 1
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma multi_compile_shadowcaster
#include "UnityCG.cginc"
struct v2f
{
V2F_SHADOW_CASTER;
};
v2f vert(appdata_base v)
{
v2f o;
TRANSFER_SHADOW_CASTER(o)
return o;
}
float4 frag(v2f i) : SV_Target
{
SHADOW_CASTER_FRAGMENT(i)
}
ENDCG
}
// Pass to render object as a shadow collector
// note: editor needs this pass as it has a collector pass.
Pass
{
Name "ShadowCollector"
Tags{ "LightMode" = "ShadowCollector" }
Fog{ Mode Off }
ZWrite On ZTest LEqual
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma multi_compile_shadowcollector
#define SHADOW_COLLECTOR_PASS
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
};
struct v2f
{
V2F_SHADOW_COLLECTOR;
};
v2f vert(appdata v)
{
v2f o;
TRANSFER_SHADOW_COLLECTOR(o)
return o;
}
fixed4 frag(v2f i) : SV_Target
{
SHADOW_COLLECTOR_FRAGMENT(i)
}
ENDCG
}
}
}
Image :
PS : I’m using Unity 2017
