From e11f5646aba242e3bcface0aa60b9df517c13a26 Mon Sep 17 00:00:00 2001
From: Alan Jeffrey <ajeffrey@mozilla.com>
Date: Thu, 11 Apr 2019 11:19:18 -0500
Subject: [PATCH] Don't draw the floor if the background is transparent

---
 demo/common/src/lib.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/demo/common/src/lib.rs b/demo/common/src/lib.rs
index 41689815..c3af53de 100644
--- a/demo/common/src/lib.rs
+++ b/demo/common/src/lib.rs
@@ -487,6 +487,10 @@ impl<W> DemoApp<W> where W: Window {
             RenderTransform::Perspective(perspective) => perspective,
         };
 
+        if self.ui.background_color == BackgroundColor::Transparent {
+            return;
+        }
+
         let ground_scale = self.scene_view_box.max_x() * 2.0;
 
         let mut base_transform = perspective.transform;