diff --git a/World.cs b/World.cs
index 94d61a9..ddc5d8b 100644
--- a/World.cs
+++ b/World.cs
@@ -74,13 +74,13 @@ namespace Voxel
             float tDeltaZ = direction.Z != 0 ? MathF.Abs(1 / direction.Z) : float.MaxValue;
 
             float tMaxX = direction.X > 0
-                ? (MathF.Floor(origin.X) + 1 - origin.X) * tDeltaX
+                ? (MathF.Ceiling(origin.X) - origin.X) * tDeltaX
                 : (origin.X - MathF.Floor(origin.X)) * tDeltaX;
             float tMaxY = direction.Y > 0
-                ? (MathF.Floor(origin.Y) + 1 - origin.Y) * tDeltaY
+                ? (MathF.Ceiling(origin.Y) + 1 - origin.Y) * tDeltaY
                 : (origin.Y - MathF.Floor(origin.Y)) * tDeltaY;
             float tMaxZ = direction.Z > 0
-                ? (MathF.Floor(origin.Z) + 1 - origin.Z) * tDeltaZ
+                ? (MathF.Ceiling(origin.Z) + 1 - origin.Z) * tDeltaZ
                 : (origin.Z - MathF.Floor(origin.Z)) * tDeltaZ;
 
             float distance = 0f;