diff --git a/packages/graphics/stage.js b/packages/graphics/stage.js
index f8a19ed..3db64b7 100644
--- a/packages/graphics/stage.js
+++ b/packages/graphics/stage.js
@@ -13,8 +13,9 @@ const decorate = compose(
 
 export class Stage extends decorate(Container) {
 
-  constructor(size) {
+  constructor(visibleSize, visibleScale) {
     super();
+    const size = Vector.mul(visibleSize, visibleScale);
     // Container element.
     this.element = window.document.createElement('div');
     this.element.className = 'avocado-stage';
@@ -58,6 +59,8 @@ export class Stage extends decorate(Container) {
     this.element.appendChild(this.ui);
     this.element.tabIndex = 0;
     this.on('cameraChanged', this.onCameraChanged, this);
+    // Set scale.
+    this.scale = visibleScale;
   }
 
   addToDom(parent) {