PHP PNG 24 bit clean Transparency

I have been trying to get a PNG to upload with a clean, 24 bit alpha transparency. After doing a lot of research, I have managed to get it sort of working, however the transparency seems to be low quality 8 bit as you can see here in this screenshot: http://cozomo.com/apple.png Any help to achieve a clean PNG upload and resize with 24 bit smooth transparency would be much appreciated. My current code is below. ``` if($extension=="png") { $uploadedfile = $_FILES['photo']['tmp_name']; $src = imagecreatefrompng($uploadedfile); } $dest_x = 1400; $dest_y = 1200; if ($width > $dest_x or $height > $dest_y) { if ($width >= $height) { $fullSize_x = $dest_x; $fullSize_y = $height*($fullSize_x/$width); } else { $fullSize_x = $width*($fullSize_y/$height); $fullSize_y = $dest_y; } } $fullSize=imagecreatetruecolor($fullSize_x,$fullSize_y); //TEST $black = imagecolorallocate($fullSize, 0, 0, 0); imagecolortransparent($fullSize, $black); //TEST END // OUTPUT NEW IMAGES imagecopyresampled($fullSize,$src,0,0,0,0,$fullSize_x,$fullSize_y,$width,$height); imagepng($fullSize, "/user/photos/".$filename); imagedestroy($fullSize); [1]: https://i.stack.imgur.com/w8VBI.png ```