diff --git a/crates/bevy_pbr/src/material.rs b/crates/bevy_pbr/src/material.rs
index ec9e4364b9521..9a5e89bd1522a 100644
--- a/crates/bevy_pbr/src/material.rs
+++ b/crates/bevy_pbr/src/material.rs
@@ -136,12 +136,18 @@ pub trait Material: AsBindGroup + Send + Sync + Clone + TypeUuid + TypePath + Si
 
     /// Returns this material's prepass vertex shader. If [`ShaderRef::Default`] is returned, the default prepass vertex shader
     /// will be used.
+    ///
+    /// This is used for the various [prepasses](bevy_core_pipeline::prepass) as well as for generating the depth maps
+    /// required for shadow mapping.
     fn prepass_vertex_shader() -> ShaderRef {
         ShaderRef::Default
     }
 
     /// Returns this material's prepass fragment shader. If [`ShaderRef::Default`] is returned, the default prepass fragment shader
     /// will be used.
+    ///
+    /// This is used for the various [prepasses](bevy_core_pipeline::prepass) as well as for generating the depth maps
+    /// required for shadow mapping.
     #[allow(unused_variables)]
     fn prepass_fragment_shader() -> ShaderRef {
         ShaderRef::Default