diff --git a/src/core/mod.rs b/src/core/mod.rs
index e516fb5..d609ac7 100644
--- a/src/core/mod.rs
+++ b/src/core/mod.rs
@@ -1,3 +1,5 @@
+//! Core pathtracing pipeline elements
+
 pub mod camera;
 pub use camera::*;