diff --git a/GUI/src/main/java/cz/fidentis/analyst/gui/RegistrationCPEventListener.java b/GUI/src/main/java/cz/fidentis/analyst/gui/RegistrationCPEventListener.java
index d89022d8be0370a9dbdd7eafe85962a082a2f6df..da67bdddb94b98b871b2e910ff51e6a009180627 100644
--- a/GUI/src/main/java/cz/fidentis/analyst/gui/RegistrationCPEventListener.java
+++ b/GUI/src/main/java/cz/fidentis/analyst/gui/RegistrationCPEventListener.java
@@ -82,25 +82,25 @@ public class RegistrationCPEventListener {
     public void setTransparency(int value) {
         
         if (value == transparencyRange) {
-            setPrimaryTransparency(1d);
-            setSecondaryTransparency(1d);
+            setPrimaryTransparency(1);
+            setSecondaryTransparency(1);
         }
         if (value < transparencyRange) {
-            setPrimaryTransparency(value / 10d);
-            setSecondaryTransparency(1d);
+            setPrimaryTransparency(value / 10f);
+            setSecondaryTransparency(1);
         }
         if (value > transparencyRange) {
-            setSecondaryTransparency((2 * transparencyRange - value) / 10d);
-            setPrimaryTransparency(1d);
+            setSecondaryTransparency((2 * transparencyRange - value) / 10f);
+            setPrimaryTransparency(1);
         }
         canvas.renderScene();
     }
     
-    public void setPrimaryTransparency(double transparency) {
+    public void setPrimaryTransparency(float transparency) {
         primaryFace.setTransparency(transparency);
     }
 
-    public void setSecondaryTransparency(double transparency) {
+    public void setSecondaryTransparency(float transparency) {
         secondaryFace.setTransparency(transparency);
     }
     
diff --git a/GUI/src/main/java/cz/fidentis/analyst/gui/scene/DrawableMesh.java b/GUI/src/main/java/cz/fidentis/analyst/gui/scene/DrawableMesh.java
index 11c518ed5df19e0fee22fd461e2726a28afe85c3..74b8988c3666b7f3a58a5aaf6f955d7a0aea0fbc 100644
--- a/GUI/src/main/java/cz/fidentis/analyst/gui/scene/DrawableMesh.java
+++ b/GUI/src/main/java/cz/fidentis/analyst/gui/scene/DrawableMesh.java
@@ -21,7 +21,7 @@ public class DrawableMesh {
     
     // TO DO - R. Pajersky: add transformation attributes and methods
     private Color color = new Color(255, 255, 255);
-    private double transparency = 1f;
+    private float transparency = 1;
     private Vector3d translation = new Vector3d(0, 0, 0);
     private Vector3d rotation = new Vector3d(0, 0, 0);
     private Vector3d scale = new Vector3d(0, 0, 0);
@@ -78,11 +78,11 @@ public class DrawableMesh {
         return color;
     }
     
-    public double getTransparency() {
+    public float getTransparency() {
         return transparency;
     }
 
-    public void setTransparency(double transparency) {
+    public void setTransparency(float transparency) {
         this.transparency = transparency;
     }