Hello,
the random image at userbars.ru is not reduced. It is just a thumbnail 100 pixels wide.
In fact, in the homepage, new images are shown with their actual size, 350 pixels wide and 20 pixels height.
They have only changed the file "thumbnail_bit.html" in their template, as shown below, to display original images instead of thumbnails:
[qcode]<!--
you wish detail page in a small javascript open window, use {thumbnail_openwindow}
{thumbnail}<br />
-->
{image}
<b>{image_name}</b> {if image_is_new}<sup class="new">{lang_new}</sup>{endif image_is_new} ({user_name_link})
<br />
<a href="{cat_url}">{cat_name}</a> -
{if allow_comments}{lang_comments} {image_comments}{endif allow_comments}
<!--
<br />
{lightbox_button}
-->[/qcode]
If you want to do the same thing with userbars, for instance, set your thumbnails to 100 pixels, and change your "thumbnail_bit.html" template as shown above.
Bye.