diff --git a/src/renderer/VolumeWorld.js b/src/renderer/VolumeWorld.js
index 8aad4b1..9e43211 100644
--- a/src/renderer/VolumeWorld.js
+++ b/src/renderer/VolumeWorld.js
@@ -63,6 +63,7 @@ export default class VolumeWorld {
 
             let rendererSize = new THREE.Vector2();
             this.renderer.getSize(rendererSize);
+            rendererSize = rendererSize.multiplyScalar(this.renderer.getPixelRatio());
 
             this.clearview = new Clearview(this.raymarcher, rendererSize, volumeBox, this.settings);