Okie dokie, so you'll need to put it in the manage function. (Assuming you want it to appear while a user is managing an individual pet).
You can do it like this:

Under the manage function you'll see this:
Now remove the $document->add($image);. Go to the new Comment below that and replace the text within the " " with this:
I think that should work, though I haven't tested it because my manage function is heavily modified, so I had to find the original and edit it.

Sorry to keep bothering you, but it still doesn't work. It's givin me a blank page (syntax error on "<img src='{$adopt->getImage()}'/>" and when I get rid of it, the background still doesn't show. I've tried all sorts of things but for some reason can't get it. I even tried echoing the {$adopt->background} inside the style to see if that helped but still nothing.

to call the background you must use the same name given in the owned_adoptables database, so if you used the same name posted here: adoptbackground then the correct way to call it it would be: {$adopt->adoptbackground} and the way to call the adopt image is the one you posted: <img src='{$adopt->getImage()}'/> dont know why is giving you a syntax error...=\

That was a typo in my comment, oops! Here is the code I use which gives me a 500 error:

public function manage(){
$mysidia = Registry::get("mysidia");
$aid = $this->getField("aid")->getValue();
$name = $this->getField("name")->getValue();
$image = $this->getField("image");

$document = $this->document;
$document->setTitle("Managing {$name}");
$document->add(new Comment("<div style='background:{$adopt->adoptbackground} no-repeat;vertical-align:bottom;text-align:center;width:100px;height:400px'><img src='{$adopt->getImage()}'/></div><br><br>This page allows you to manage {$name}. Click on an option below to change settings.<br> "));


Here is what happens with the same code except I removed the "img src" tag" (I gave it a height and width to show the div was being created and modified):
http://imgur.com/a/obD4g

Thanks for the help guys.

Alright, so it's failing to call the background URL. What should the URL appear as for that adoptable?

Okay, so this is what I have for my site:
Try replacing style='background:{$adopt->adoptbackground} no-repeat;vertical-align:bottom;text-align:center;width:100px;height:400px' with this:

Heya! I'd love to get this working, but the background image isn't showing up on the pet. Halp?

My code isn't throwing any errors, so not really sure where to go from here. I've tried it in a few different places, but every time nothing changes.

This is the line of code Dinocaid helped me put together, but it's not working either:

I've already uploaded an image and made it a background item, then used it on my pet. I've removed the code from all the pages so my users can still see their pets in the meantime.

Thanks for any help!

@ Abronsyth

cool. Thank you very much for for sharings this :)

@ Nobody

Have you try it with

?

this works for me :wutno:

Hi (sorry for my bad english, i'm from germany :D ),

i tried to bring the background to my game, but i'ts dont show =/ and when i try to show the pet-picture, i became an error:

That's the Line:
can anyone help me? :)
btw i hope you understand me :coloness:

Hey Nairi ... endlich mal jemand aus der Heimat :happyc:

hast du unter "Public function manage" stehen

?

und versuch es mal mit getadoptbackground

Hey :)

Na, das ist ja klasse.

Also das Bild vom Haustier wird nun angezeigt, danke :)
Der Hintergrund aber leider noch immer nicht. Sehr mysteriös