diff --git a/gfx/shaders/basic.frag b/gfx/shaders/basic.frag
index 1c817c6..1dd5776 100644
--- a/gfx/shaders/basic.frag
+++ b/gfx/shaders/basic.frag
@@ -9,9 +9,6 @@ uniform sampler2D texture0;
 void main()
 {
     color = texture(texture0, TexCoord);
-    
-    // discard alpha
-    if (color.a < 1.0) discard;
 
     // gamma correction
     color = pow(color, vec4(0.4545));
diff --git a/main.go b/main.go
index 40030a5..17aff07 100644
--- a/main.go
+++ b/main.go
@@ -39,19 +39,21 @@ func main() {
 	glfw.WindowHint(glfw.ContextVersionMinor, 1)
 	glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
 	glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
+	glfw.WindowHint(glfw.Samples, 8)
 	window, err := glfw.CreateWindow(defaultSize, defaultSize, "image widget", nil, nil)
 	if err != nil {
 		log.Fatalln("failed to create window:", err)
 	}
 
 	window.MakeContextCurrent()
+	helper.NewWindowMoveHandler(window)
+	helper.NewWindowCloseHandler(window, glfw.KeyEscape)
 
 	if err := gl.Init(); err != nil {
 		log.Fatalln("failed to init gl:", err)
 	}
 
-	helper.NewWindowMoveHandler(window)
-	helper.NewWindowCloseHandler(window, glfw.KeyEscape)
+	gl.Enable(gl.MULTISAMPLE)
 
 	if err := programLoop(window); err != nil {
 		log.Fatalln("failed to exec program loop:", err)