diff --git a/Framework/include/scene.hpp b/Framework/include/scene.hpp
index 13c6b4f..9c66ff0 100644
--- a/Framework/include/scene.hpp
+++ b/Framework/include/scene.hpp
@@ -253,7 +253,7 @@ struct RenderScene {
         else if (auto light = in.dynamicCast<SceneGraph::LightNodeImpl<SceneGraph::PointLight> >())
             PointLight_set(out, light->light.P, light->light.I, 0.f);
         else if (auto light = in.dynamicCast<SceneGraph::LightNodeImpl<SceneGraph::QuadLight> >())
-            QuadLight_set(out, light->light.v0,light->light.v1-light->light.v0,light->light.v2-light->light.v0,light->light.L);
+            QuadLight_set(out, light->light.v0,light->light.v3-light->light.v0,light->light.v2-light->light.v0,light->light.L);
     }
 
     RTCScene scene;