diff --git a/app/img/nodes/endoplasmic-reticulum.svg b/app/img/nodes/endoplasmic-reticulum.svg
index bf9a0104..d0c89771 100644
--- a/app/img/nodes/endoplasmic-reticulum.svg
+++ b/app/img/nodes/endoplasmic-reticulum.svg
@@ -1,12 +1,29 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="200px" height="200px" viewBox="0 0 200 200" enable-background="new 0 0 200 200" xml:space="preserve">
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+     width="800px" height="800px" viewBox="0 0 200 200" enable-background="new 0 0 200 200" xml:space="preserve">
+  <defs>
+    <filter id="sharpen" x="0" y="0">
+      <feConvolveMatrix in="SourceGraphic"
+                        order="3"
+                        kernelMatrix="0 -1 0 -1 5 -1 0 -1 0"
+                        edgeMode="duplicate"
+                        preserveAlpha="true"/>
+    </filter>
+    <filter id="enhance" filterUnits="objectBoundingBox" x="0%" y="0%" width="100%" height="100%">
+      <feComponentTransfer>
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+        <feFuncG type="linear" slope="1.0" intercept="0"/>
+        <feFuncB type="linear" slope="1.0" intercept="0"/>
+      </feComponentTransfer>
+    </filter>
+  </defs>
   <image id="image0" width="200" height="200" x="0" y="0"
-    href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAPCAQAAABHeoekAAAABGdBTUEAALGPC/xhBQAAACBjSFJN
+         href="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAPCAQAAABHeoekAAAABGdBTUEAALGPC/xhBQAAACBjSFJN
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diff --git a/app/img/nodes/sarcoplasmic-reticulum.svg b/app/img/nodes/sarcoplasmic-reticulum.svg
index 619078a4..7831cfbd 100644
--- a/app/img/nodes/sarcoplasmic-reticulum.svg
+++ b/app/img/nodes/sarcoplasmic-reticulum.svg
@@ -1,11 +1,20 @@
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-  <image id="image0" width="200" height="200" x="0" y="0"
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="800px" height="800px" viewBox="0 0 200 200" enable-background="new 0 0 200 200" xml:space="preserve">
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+        <feFuncG type="linear" slope="0.5"/>
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+    </filter>
+  </defs>
+  <image id="image0" width="200" height="187.5" x="0" y="6.25"
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 </svg>
\ No newline at end of file