diff --git a/Assets/Resources/Brushes/Shared/Shaders/DiffuseSingleSided.shader b/Assets/Resources/Brushes/Shared/Shaders/DiffuseSingleSided.shader
index 140077bfc0..013c7d769d 100644
--- a/Assets/Resources/Brushes/Shared/Shaders/DiffuseSingleSided.shader
+++ b/Assets/Resources/Brushes/Shared/Shaders/DiffuseSingleSided.shader
@@ -93,6 +93,7 @@ SubShader {
 CGPROGRAM
 #pragma surface surf Lambert vertex:vert alphatest:_Cutoff
 #pragma multi_compile __ ODS_RENDER ODS_RENDER_CM
+#pragma target 4.0
 #include "Assets/Shaders/Include/Brush.cginc"
 
 sampler2D _MainTex;
@@ -106,7 +107,9 @@ struct Input {
   float2 uv_MainTex;
   float4 color : COLOR;
   uint id : SV_VertexID;
+  float4 vertex : POSITION;
   float4 screenPos;
+  fixed vface : VFACE;
 };
 
 struct appdata_full_plus_id {
@@ -123,7 +126,7 @@ struct appdata_full_plus_id {
 };
 
 void vert (inout appdata_full_plus_id v, out Input o) {
-  UNITY_INITIALIZE_OUTPUT(Input, v);
+  UNITY_INITIALIZE_OUTPUT(Input, o);
   PrepForOds(v.vertex);
   v.color = TbVertToNative(v.color);
 }
diff --git a/Assets/Resources/Brushes/Shared/Shaders/StandardDoubleSided.shader b/Assets/Resources/Brushes/Shared/Shaders/StandardDoubleSided.shader
index 3938da22f5..ae5b3b2611 100644
--- a/Assets/Resources/Brushes/Shared/Shaders/StandardDoubleSided.shader
+++ b/Assets/Resources/Brushes/Shared/Shaders/StandardDoubleSided.shader
@@ -181,7 +181,7 @@ Properties {
         fixed4 frag (v2f i, fixed vface : VFACE) : SV_Target {
 
           if (_ClipEnd > 0 && !(i.id.x > _ClipStart && i.id.x < _ClipEnd)) discard;
-          if (_Opacity < 1 && Dither8x8(i.vertex.xy) >= _Opacity) discard;
+          if (_Opacity < 1 && Dither8x8(i.pos.xy) >= _Opacity) discard;
 
           fixed4 col = i.color;
           col.a = tex2D(_MainTex, i.uv).a * col.a;
@@ -501,7 +501,7 @@ Properties {
         fixed4 frag (v2f i, fixed vface : VFACE) : SV_Target {
 
           if (_ClipEnd > 0 && !(i.id.x > _ClipStart && i.id.x < _ClipEnd)) discard;
-          if (_Opacity < 1 && Dither8x8(i.vertex.xy) >= _Opacity) discard;
+          if (_Opacity < 1 && Dither8x8(i.pos.xy) >= _Opacity) discard;
 
           fixed4 col = i.color;
           col.a *= tex2D(_MainTex, i.uv).a;