Actually.. I can c the larger image fine on my iPad. Just need to tap to enlarge the thumbnail size or on a normal computer probably double click.
A file uploaded directly to rff, it creates a thumbnail only viewable when members are logged in. A file that is uploaded via Flickr or google plus or any other photo service web site, retains the specified dimensions u uploaded w/.. When u copy URL info that has jpg name associated w/ it between the '
' keywords when u do a normal reply to thread, the picture from that website is inserted. These files are viewable by everyone unless u put restrictions at the site itself.
As a general rule, I tend to keep my post size no bigger than 1024x1024 so as not to eat up download time to view for those who may have slow internet connections out if courtesy, but I am not aware of any hard fast size limits right now when done via a picture site.
Gary