diff --git a/view.hh b/view.hh
index 91330dd..b39769a 100644
--- a/view.hh
+++ b/view.hh
@@ -65,7 +65,7 @@ public:
     {
         return [&](unsigned x,unsigned y,float z, auto&&... rest)
         {
-            if(/* x <= W && y <= H && */ z < zbuffer[y*W+x])
+            if( x < W && y < H && z < zbuffer[y*W+x])
             {
                 pixels[y*W+x]  = func(x,y,z, std::forward<decltype(rest)>(rest)...);
                 zbuffer[y*W+x] = z;
@@ -104,7 +104,7 @@ public:
     }
     auto MakeFrustum() const
     {
-        return MakeFrustum(std::initializer_list{ std::pair{0,0}, {W-1,0}, {W-1,H-1}, {0,H-1} });
+        return MakeFrustum(std::initializer_list{ std::pair{0.f,0.f}, {W+0.001f,0}, {W+0.001f,H+0.001f}, {0,H+0.001f} });
     }
 };