diff --git a/tape-drive/src/threads.rs b/tape-drive/src/threads.rs
index 8f544cf..703c96b 100644
--- a/tape-drive/src/threads.rs
+++ b/tape-drive/src/threads.rs
@@ -525,7 +525,7 @@ fn create_csg(seed: u64) -> SSATape {
 }
 
 fn interval_check(csg: &CSG, time: f32) -> (Vec3, Vec3) {
-    let (highest_corner, lowest_corner) = csg.parts.get_aabb(time);
+    let (lowest_corner, highest_corner) = csg.parts.get_aabb(time);
     (highest_corner - lowest_corner, lowest_corner)
 }