diff --git a/Cargo.lock b/Cargo.lock
index a14a22e..5f5c32b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7,6 +7,7 @@ name = "csg"
 version = "0.1.0"
 dependencies = [
  "glam",
+ "itertools",
 ]
 
 [[package]]
@@ -16,8 +17,23 @@ dependencies = [
  "csg",
 ]
 
+[[package]]
+name = "either"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
+
 [[package]]
 name = "glam"
 version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42218cb640844e3872cc3c153dc975229e080a6c4733b34709ef445610550226"
+
+[[package]]
+name = "itertools"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1c173a5686ce8bfa551b3563d0c2170bf24ca44da99c7ca4bfdab5418c3fe57"
+dependencies = [
+ "either",
+]
diff --git a/csg/Cargo.toml b/csg/Cargo.toml
index f969eb9..5d04a1d 100644
--- a/csg/Cargo.toml
+++ b/csg/Cargo.toml
@@ -7,3 +7,4 @@ edition = "2021"
 
 [dependencies]
 glam = "0.24.1"
+itertools = "0.11.0"
diff --git a/csg/src/brush.rs b/csg/src/brush.rs
index cb26afa..1c1ec54 100644
--- a/csg/src/brush.rs
+++ b/csg/src/brush.rs
@@ -81,7 +81,10 @@ impl Brush {
     }
 
     fn calculate_raw_vertices(&mut self) {
-        // Test all permutations of brush planes for intersections
+        // Test all combinations of brush planes for intersections
+        // I experimented with Itertools::(tuple_)combinations instead of this nested loop
+        // but it was about 2x slower
+        // TODO: Experiment more
         let mut intersections = vec![];
         let len = self.planes.len();
         for i in 0..(len - 2) {