diff --git a/src/runner/instance.rs b/src/runner/instance.rs
index b48db732..c81d874d 100644
--- a/src/runner/instance.rs
+++ b/src/runner/instance.rs
@@ -238,3 +238,15 @@ impl Script{
 		Ok((get_full_name(&context.dom,instance),source))
 	}
 }
+
+class!(Terrain);
+class_composition!(Terrain,(Instance,Terrain));
+impl Terrain{
+	fn composition_add_fields<'lua,T:Referent,F:mlua::UserDataFields<'lua,T>>(fields:&mut F){
+	}
+	fn composition_add_methods<'lua,T,M:mlua::UserDataMethods<'lua,T>>(methods:&mut M){
+		methods.add_method("FillBlock",|lua,this,_:(super::cframe::CFrame,Vector3,super::r#enum::Enum)|
+			Ok(())//Ok(mlua::Value::Nil)
+		)
+	}
+}