diff --git a/QT/alpha-blending/l0.png b/QT/alpha-blending/l0.png
new file mode 100644
index 0000000..52184bf
Binary files /dev/null and b/QT/alpha-blending/l0.png differ
diff --git a/QT/alpha-blending/l1.png b/QT/alpha-blending/l1.png
new file mode 100644
index 0000000..72b2051
Binary files /dev/null and b/QT/alpha-blending/l1.png differ
diff --git a/QT/alpha-blending/mywindow.cpp b/QT/alpha-blending/mywindow.cpp
index df76cab..3fab374 100644
--- a/QT/alpha-blending/mywindow.cpp
+++ b/QT/alpha-blending/mywindow.cpp
@@ -48,7 +48,6 @@ std::vector<float> matrixMul3x3(std::vector<float> m1, std::vector<float> m2)
     return res;
 }
 
-
 QColor mul(float v, QColor c){
     int red = (int)(c.red() * v);
     if(red > 255) red = 255;
@@ -56,7 +55,9 @@ QColor mul(float v, QColor c){
     if(green > 255) green = 255;
     int blue = (int)(c.blue() * v);
     if(blue > 255) blue = 255;
-    return QColor(red, green, blue);
+    int alpha = (int)(c.alpha() * v);
+    if(alpha > 255) alpha = 255;
+    return QColor(red, green, blue, alpha);
 }
 
 QColor add(QColor c1, QColor c2){
@@ -66,7 +67,9 @@ QColor add(QColor c1, QColor c2){
     if(green > 255) green = 255;
     int blue = (int)(c1.blue() + c2.blue());
     if(blue > 255) blue = 255;
-    return QColor(red, green, blue);
+    int alpha = (int)(c1.alpha() + c2.alpha());
+    if(alpha > 255) alpha = 255;
+    return QColor(red, green, blue, alpha);
 }
 // Definicja konstruktora, wywolujemy najpierw
 // konstruktor klasy nadrzednej, nastepnie tworzymy
@@ -94,12 +97,16 @@ MyWindow::MyWindow(QWidget *parent) :
     // (0xffRRGGBB).
     img = new QImage(szer,wys,QImage::Format_RGB32);
 
-    loaded_img1 = new QImage("/home/davp/umk/2022_2023/GK/QT/alpha-blending/p.png");
-    loaded_img2 = new QImage("/home/davp/umk/2022_2023/GK/QT/alpha-blending/f.png");
+//    loaded_img1 = new QImage("/Users/dawidpietrykowski/Desktop/projects/umk/GK/QT/alpha-blending/p.png");
+//    loaded_img2 = new QImage("/Users/dawidpietrykowski/Desktop/projects/umk/GK/QT/alpha-blending/f.png");
+    loaded_img1 = new QImage("/Users/dawidpietrykowski/Desktop/projects/umk/GK/QT/alpha-blending/l0.png");
+    loaded_img2 = new QImage("/Users/dawidpietrykowski/Desktop/projects/umk/GK/QT/alpha-blending/l1.png");
 
     rotation_angle = 0;
 
 
+    alpha = 0;
+
     UpdateImage();
 }
 
diff --git a/QT/triangle-textures/mywindow.cpp b/QT/triangle-textures/mywindow.cpp
index 416c498..1fad8c2 100644
--- a/QT/triangle-textures/mywindow.cpp
+++ b/QT/triangle-textures/mywindow.cpp
@@ -56,7 +56,9 @@ QColor mul(float v, QColor c){
     if(green > 255) green = 255;
     int blue = (int)(c.blue() * v);
     if(blue > 255) blue = 255;
-    return QColor(red, green, blue);
+    int alpha = (int)(c.alpha() * v);
+    if(alpha > 255) alpha = 255;
+    return QColor(red, green, blue, alpha);
 }
 
 QColor add(QColor c1, QColor c2){
@@ -66,7 +68,9 @@ QColor add(QColor c1, QColor c2){
     if(green > 255) green = 255;
     int blue = (int)(c1.blue() + c2.blue());
     if(blue > 255) blue = 255;
-    return QColor(red, green, blue);
+    int alpha = (int)(c1.alpha() + c2.alpha());
+    if(alpha > 255) alpha = 255;
+    return QColor(red, green, blue, alpha);
 }
 // Definicja konstruktora, wywolujemy najpierw
 // konstruktor klasy nadrzednej, nastepnie tworzymy
@@ -117,6 +121,8 @@ MyWindow::MyWindow(QWidget *parent) :
                 DrawPixel(img, x, y, color);
         }
 
+    UpdateImage();
+
     update();
 }