Если в лоб, то:
[CODE]
$res = CIBlockElement::GetList(
false,
array(
'IBLOCK_ID' => ...,
'SECTION_ID' => ...,
'INCLUDE_SUBSECTIONS' => 'Y',
'!DETAIL_PICTURE' => false,
),
false,
false,
array('DETAIL_PICTURE')
);
while ($el = $res->Fetch())
{
$pic = CFile::GetFileArray($el['DETAIL_PICTURE']);
if (is_array($pic))
echo '<img src="'.$pic['SRC].'" alt="" />';
}
[/CODE]