From b6ce0a9724f123396b59e9b7b90ab2d44dda2534 Mon Sep 17 00:00:00 2001
From: Hakim El Hattab <hakim.elhattab@gmail.com>
Date: Thu, 8 Nov 2018 14:05:53 +0100
Subject: [PATCH] fix concave/convex transitions on vertical slides #1947

---
 css/reveal.css  | 3 ++-
 css/reveal.scss | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/css/reveal.css b/css/reveal.css
index b024bd0f..4a9c6043 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -486,7 +486,8 @@ body {
           perspective-origin: 50% 40%; }
 
 .reveal .slides > section {
-  -ms-perspective: 600px; }
+  -webkit-perspective: 600px;
+          perspective: 600px; }
 
 .reveal .slides > section,
 .reveal .slides > section > section {
diff --git a/css/reveal.scss b/css/reveal.scss
index eeed56bf..63d1d457 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -588,7 +588,7 @@ $controlsArrowAngleActive: 36deg;
 }
 
 .reveal .slides>section {
-	-ms-perspective: 600px;
+	perspective: 600px;
 }
 
 .reveal .slides>section,