diff --git a/Cargo.toml b/Cargo.toml
index e764958..0bf8853 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,3 +8,6 @@ edition = "2021"
 [dependencies]
 scad = "1.2.2"
 nalgebra = "0.16.14"
+
+[features]
+film = []
diff --git a/Makefile b/Makefile
index f88d7d5..d9aff11 100644
--- a/Makefile
+++ b/Makefile
@@ -69,6 +69,7 @@ build/testwing-clear.scad: build/testwing.scad
 	sed 's/color("clear-blue")/color([0.0,1.0,1.0,1.0])/g' -i $@
 
 build/assembly-clear.scad: build/assembly.scad
-	sed 's/color("clear-red")/color([1.0,0.0,0.0,0.9])/g' $< > $@
+	cargo run --features film
+	sed 's/color("clear-red")/color([1.0,0.0,0.0,0.5])/g' $< > $@
 	sed 's/color("clear-blue")/color([0.0,1.0,0.0,0.9])/g' -i $@
 	sed 's/color("clear-blue")/color([0.0,0.0,1.0,0.9])/g' -i $@
diff --git a/src/main.rs b/src/main.rs
index 9003ce8..e842af4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -21,6 +21,14 @@ fn main() {
 
     // main wing
     let mut wing_transform = mirrored_wing(&wing_airfoil, &WING);
+
+    #[cfg(feature = "film")] {
+        let mut wrapped = scad!(Hull; wing_transform.visualization.clone());
+        wrapped = scad!(Minkowski; wrapped);
+        wrapped.add_child(scad!(Sphere(Radius(1.0))));
+        scad_file.add_object(scad!(NamedColor("clear-red".to_string()); wrapped));
+    }
+
     scad_file.add_object(wing_transform.visualization);
     parts.append(wing_transform.parts.as_mut());
 
@@ -40,10 +48,27 @@ fn main() {
     parts.append(struts.parts.as_mut());
     parts.append(spar.parts.as_mut());
     rudder = scad!(Translate(vec3(LENGTH-RUDDER_CHORD, 0.0, 0.0)); rudder);
+
+    #[cfg(feature = "film")] {
+        let mut wrapped = scad!(Hull; rudder.clone());
+        wrapped = scad!(Minkowski; wrapped);
+        wrapped.add_child(scad!(Sphere(Radius(1.0))));
+        scad_file.add_object(scad!(NamedColor("clear-red".to_string()); wrapped));
+    }
+
     scad_file.add_object(rudder);
 
     // elevator
     let mut elevator = mirrored_wing(&wing_airfoil, &ELEVATOR);
+
+    #[cfg(feature = "film")] {
+        let elevator = scad!(Translate(vec3(LENGTH - ELEVATOR_CHORD, 0.0, 0.0)); elevator.visualization.clone());
+        let mut wrapped = scad!(Hull; elevator);
+        wrapped = scad!(Minkowski; wrapped);
+        wrapped.add_child(scad!(Sphere(Radius(1.0))));
+        scad_file.add_object(scad!(NamedColor("clear-red".to_string()); wrapped));
+    }
+
     scad_file.add_object(scad!(Translate(vec3(LENGTH - ELEVATOR_CHORD, 0.0, 0.0)); elevator.visualization));
     parts.append(&mut elevator.parts);