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[F0LLETT]

Unfortunately, not going to happen. No site allows this generally and for good reason.
One of the main issues would be leeching.

[F0LLETT]

I was talking generally, I was gong to look at small previews.

That first link you gave is mad, to me that is not a forum. That is a blog site, like wordpress.

Unfortunately, not going to happen. No site allows this generally and for good reason.

I respectfully disagree with you here.  In my experience the normal forum behaviour is to display small thumbnails of the attachments so that you can at least get the gist of what has been attached to the post.
For example, see here:

https://forum.allaboutcircuits.com/threads/laser-diode-cw-driver.164040/

In contrast, this is how an amiga.org post with attachments looks (view it logged out):

https://forum.amiga.org/index.php?topic=74324

For images it's possible to work around this issue using third party hosting.   See one of my posts, here:

https://forum.amiga.org/index.php?topic=74245.msg844631#msg844631

The issue, of course, is that we are then reliant upon a third party for future readability of the forum message.  Personally I agree with Paul's suggestion that it should at least be possible to see thumbnails of the attachments, even if you have to be logged in to see the full size images.

[F0LLETT]

I was gong to look at small previews.

I notice that you've been working on it.  Nice.

Yep, also spent the last 12 hours working on gallery.

[F0LLETT]

Wow, my towerized A500 is back!

That was a quick test, still hand processing the last of 4000+ images, .