diff --git a/src/bin/flat.rs b/src/bin/flat.rs
index f4e2f85..518b421 100644
--- a/src/bin/flat.rs
+++ b/src/bin/flat.rs
@@ -65,6 +65,7 @@ pub fn main() {
 			draw_track(gc, &space, vec2(-500.0, 0.0), vec2(1.0, 0.5));
 			draw_track(gc, &space, vec2(-0.5 * tube.inner_radius, -1.25 * tube.external_halflength), vec2(0.1, 1.0));
 
+			let circle_segments = 47;
 			for obj in &space.objs {
 				let pos = obj.loc.pos;
 				gc.new_path();
@@ -73,19 +74,19 @@ pub fn main() {
 				gc.fill();
 
 				gc.stroke_color(Color::Rgba(0.0, 0.0, 0.0, 0.5));
-				draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, 32).skip(1).map(|φ| {
+				draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, circle_segments).skip(1).map(|φ| {
 					let dir = Vec2::from_angle(φ) * obj.r;
 					let dir = obj.loc.rot * dir;
 					pos + dir
 				}));
 				gc.stroke_color(Color::Rgba(0.0, 0.5, 1.0, 0.5));
-				draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, 32).skip(1).map(|φ| {
+				draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, circle_segments).skip(1).map(|φ| {
 					let dir = Vec2::from_angle(φ) * obj.r;
 					let dir = obj.loc.rot * dir;
 					space.trace_step(Ray { pos, dir }).pos
 				}));
 				gc.stroke_color(Color::Rgba(0.5, 0.0, 1.0, 1.0));
-				draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, 32).skip(1).map(|φ| {
+				draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, circle_segments).skip(1).map(|φ| {
 					let n = obj.r.floor();
 					let d = obj.r / n;
 					let dir = Vec2::from_angle(φ);