diff --git a/css/theme/beige.css b/css/theme/beige.css
index 514427cd..be64a2fb 100644
--- a/css/theme/beige.css
+++ b/css/theme/beige.css
@@ -209,6 +209,10 @@ body {
   border: 4px solid #333;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/black.css b/css/theme/black.css
index 7d3bee4f..300c6bd7 100644
--- a/css/theme/black.css
+++ b/css/theme/black.css
@@ -205,6 +205,10 @@ body {
   border: 4px solid #fff;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/blood.css b/css/theme/blood.css
index 768d2a36..3a9e0235 100644
--- a/css/theme/blood.css
+++ b/css/theme/blood.css
@@ -214,6 +214,10 @@ body {
   border: 4px solid #eee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/league.css b/css/theme/league.css
index c6d07f69..224e09d8 100644
--- a/css/theme/league.css
+++ b/css/theme/league.css
@@ -211,6 +211,10 @@ body {
   border: 4px solid #eee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/moon.css b/css/theme/moon.css
index 4817c18d..b02eae42 100644
--- a/css/theme/moon.css
+++ b/css/theme/moon.css
@@ -209,6 +209,10 @@ body {
   border: 4px solid #93a1a1;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/night.css b/css/theme/night.css
index 71319b2b..b873b3e6 100644
--- a/css/theme/night.css
+++ b/css/theme/night.css
@@ -203,6 +203,10 @@ body {
   border: 4px solid #eee;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/serif.css b/css/theme/serif.css
index ed85db68..aa0cc7b7 100644
--- a/css/theme/serif.css
+++ b/css/theme/serif.css
@@ -205,6 +205,10 @@ body {
   border: 4px solid #000;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/simple.css b/css/theme/simple.css
index d9153d7e..f1fe1d37 100644
--- a/css/theme/simple.css
+++ b/css/theme/simple.css
@@ -205,6 +205,10 @@ body {
   border: 4px solid #000;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/sky.css b/css/theme/sky.css
index f7e84022..0d9ebe83 100644
--- a/css/theme/sky.css
+++ b/css/theme/sky.css
@@ -212,6 +212,10 @@ body {
   border: 4px solid #333;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/solarized.css b/css/theme/solarized.css
index 583201a3..6c6a9bb3 100644
--- a/css/theme/solarized.css
+++ b/css/theme/solarized.css
@@ -209,6 +209,10 @@ body {
   border: 4px solid #657b83;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;
diff --git a/css/theme/template/theme.scss b/css/theme/template/theme.scss
index d1be10a7..66e9cbb2 100644
--- a/css/theme/template/theme.scss
+++ b/css/theme/template/theme.scss
@@ -259,6 +259,11 @@ body {
 	box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
 }
 
+	.reveal section img.plain {
+		border: 0;
+		box-shadow: none;
+	}
+
 	.reveal a img {
 		-webkit-transition: all .15s linear;
 		   -moz-transition: all .15s linear;
diff --git a/css/theme/white.css b/css/theme/white.css
index 5fdb2fcb..64046542 100644
--- a/css/theme/white.css
+++ b/css/theme/white.css
@@ -205,6 +205,10 @@ body {
   border: 4px solid #222;
   box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
 
+.reveal section img.plain {
+  border: 0;
+  box-shadow: none; }
+
 .reveal a img {
   -webkit-transition: all 0.15s linear;
   -moz-transition: all 0.15s linear;