1 files changed, 2 insertions, 1 deletions
diff --git a/world.scm b/world.scm
index de9027c..d09b9c9 100644
--- a/world.scm
+++ b/world.scm
@@ -39,7 +39,8 @@
     camera
     tileset-texture
     camera-target     ; symbol tag or #f
-    background)       ; #f or (r g b) / (r g b a) for framebuffer clear
+    background        ; #f or (r g b) / (r g b a) for framebuffer clear
+    engine-update)    ; #f = inherit from game, procedure = per-scene override
 
   (define (scene-add-entity scene entity)
     (update-scene scene