merge 2 GD images with alpha

[The Little Guy]

I have 2 GD images, one is a JPG, the other is a gd created image.

 

<?php
header("content-type: image/png");

$img = imagecreatefromjpeg("./real/soldier.jpg");

$img2 = imagecreatetruecolor(300, 300);
imagesavealpha($img2, true);
$color = imagecolorallocatealpha($img2, 255, 0, 0, 75);
imagefill($img2, 0, 0, $color);

$final = imagecreatetruecolor(300, 300);
imagecopymerge($final, $img, 0, 0, 0, 0, 300, 300, 100);
imagecopymerge($final, $img2, 0, 0, 0, 0, 300, 300, 100);


imagepng($final, null, 9);

 

I am trying to place the gd created image (Red image) on top of the other (soldier.jpg), but for some reason I can not figure out why the red is a solid red when I told it to have transparency to it (75).

 

So basically how do I create images like this with saved alpha?

[The Little Guy]

Why is it I always figure it out almost instantly after I post?

 

 

imagecopy not imagecopymerge