diff --git a/prosperon/clay.cm b/prosperon/clay.cm
index 02318b95..5e2b4c06 100644
--- a/prosperon/clay.cm
+++ b/prosperon/clay.cm
@@ -60,9 +60,8 @@ var focused_textbox = null
 clay.behave = layout.behave;
 clay.contain = layout.contain;
 
-clay.draw = function draw(fn)
+clay.draw = function draw(fn, size = [prosperon.camera.width, prosperon.camera.height])
 { 
-  var size = [prosperon.camera.width, prosperon.camera.height]
   lay_ctx.reset();
   var root = lay_ctx.item();
   // Accept both array and object formats