Question by laur-ganta · May 30, 2017 at 01:56 AM · android shader vertex hlsl

Why does this shader give different result Editor/ Android?

Hi,

I've written a simple curved unlit shader in HLSL that basically translates each vertex based on the distance to the camera (the magic happens in the vertex shader):

 Properties
     {
         _BendFactor ("Bend Factor", Vector) = (0, 0, 0, 0)
         _Color ("Color", Color) = (1,1,1,1)
         _MainTex ("Texture", 2D) = "white" {}
     }
     SubShader
     {
         Tags { "RenderType"="Opaque" }
         LOD 100
         
         Lighting Off
 
         Pass
         {
             CGPROGRAM
             #pragma vertex vert
             #pragma fragment frag
             
             #include "UnityCG.cginc"
 
             struct appdata
             {
                 float4 vertex : POSITION;
                 float2 uv_tex1 : TEXCOORD0;
             };
 
             struct v2f
             {
                 float2 uv_tex1 : TEXCOORD0;
                 float4 vertex : SV_POSITION;
             };
             
             fixed4 _BendFactor;
             fixed4 _Color;
             sampler2D _MainTex;
             float4 _MainTex_ST;
             
             v2f vert (appdata v)
             {
                 v2f o;
                 // here I calculate the offset
                 fixed4 offset = mul( unity_ObjectToWorld, v.vertex );
                 offset.xyz -= _WorldSpaceCameraPos.xyz;
                 
                 offset =_BendFactor * (offset.z * offset.z);
 
                 o.vertex = UnityObjectToClipPos ( v.vertex) + offset ;
 
                 o.uv_tex1 = TRANSFORM_TEX(v.uv_tex1, _MainTex);
 
                 return o;
             }
             
             fixed4 frag (v2f i) : SV_Target
             {
                 return tex2D(_MainTex, i.uv_tex1) * _Color;
             }
 
             ENDCG
         }
     }

It worked perfectly in Unity 5.5, but I just updated to 5.6 and now I get different results in Editor vs Android device. On the Y axis, I get opposite translations:

Editor: alt text