diff --git a/.gitignore b/.gitignore
index a6c483f93..66f06f10e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,4 @@ bin/custom_mesh_shared
 bin/stereo
 bin/text
 bin/relativity
+bin/custom_material
diff --git a/src/camera/camera.rs b/src/camera/camera.rs
index 722561c14..5c65060fb 100644
--- a/src/camera/camera.rs
+++ b/src/camera/camera.rs
@@ -8,7 +8,7 @@ pub trait Camera {
      * Event handling.
      */
     /// Handle a mouse event.
-    fn handle_event(&mut self, &glfw::Window, &glfw::WindowEvent);
+    fn handle_event(&mut self, _window: &glfw::Window, _event: &glfw::WindowEvent);
 
     /*
      * Transformation-related methods.
@@ -44,8 +44,8 @@ pub trait Camera {
     fn num_passes(&self) -> uint { 1u }
 
     /// Indicates that a pass will begin.
-    fn start_pass(&self, uint, &glfw::Window) { }
+    fn start_pass(&self, _pass: uint, _window: &glfw::Window) { }
 
     /// Indicates that the scene has been rendered and the post-processing is being run.
-    fn render_complete(&self, &glfw::Window) { }
+    fn render_complete(&self, _window: &glfw::Window) { }
 }
diff --git a/src/object.rs b/src/object.rs
index b76bcbfb7..60a154e7e 100644
--- a/src/object.rs
+++ b/src/object.rs
@@ -1,5 +1,6 @@
 //! Data structure of a scene node.
 
+use std::any::Any;
 use std::cell::RefCell;
 use std::rc::Rc;
 use gl::types::*;
diff --git a/src/resource/gl_primitive.rs b/src/resource/gl_primitive.rs
index beed455c5..7dd96ee41 100644
--- a/src/resource/gl_primitive.rs
+++ b/src/resource/gl_primitive.rs
@@ -11,9 +11,9 @@ mod error;
 /// Trait implemented by structures that can be uploaded to a uniform or contained by a gpu array.
 pub trait GLPrimitive: Pod {
     /// The opengl primitive type of this structure content.
-    fn gl_type(Option<Self>) -> GLuint;
+    fn gl_type(_type: Option<Self>) -> GLuint;
     /// The number of elements of type `self.gl_type()` this structure stores.
-    fn size(Option<Self>) -> GLuint;
+    fn size(_type: Option<Self>) -> GLuint;
     /// Uploads the element to a gpu location.
     fn upload(&self, location: GLuint);
 }