RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://www.domain.com [NC]
RewriteCond %{HTTP_REFERER} !^http://domain.com [NC]

# I want to ignore all *-t.jpg files but can't figure out how
RewriteCond %{REQUEST_FILENAME} -f ^(.+)-t.jpg [NC]


# forward elsewhere
RewriteRule \.(gif|jpg|png|swf)$ http://www.domain.com/images/hotlinking.gif [R,L]