diff --git a/src/visibility.rs b/src/visibility.rs
index b5eef90..768c834 100644
--- a/src/visibility.rs
+++ b/src/visibility.rs
@@ -170,7 +170,10 @@ fn viewshed_changed(
                     let translation = position.position.translation;
                     let mut points = vec![];
                     for p in &viewshed.visible_points {
-                        points.push(point!(p.x() - translation.x, p.y() - translation.y));
+                        points.push(point!(
+                            p.x() - translation.x + 0.5,
+                            p.y() - translation.y + 0.5
+                        ));
                     }
                     if let Some(shape) = ColliderShape::convex_hull(&points) {
                         if let (Some(mut collider_shape), Some(mut collider_position)) =