Image scene question

[sereal]

Im able to make white background disappear via Back Office - Preference - Image for category image scene
but when I try to put the image scene into the Product page, the white background back again, how to solve it ?

I put this code at top of the Product page

{if $scenes}
   <!-- Scenes -->
   {include file=$tpl_dir./scenes.tpl scenes=$scenes}
{else}
   <!-- Category image -->
   {if $category->id_image}
getCatImageLink($category->link_rewrite, $category->id_image, 'category')}" alt="{$category->name|escape:'htmlall':'UTF-8'}" title="{$category->name|escape:'htmlall':'UTF-8'}" id="categoryImage" />
   {/if}
{/if}

any advise ?