Watermark in attachment
 

This plugin will watermark attached images on your forums. works on 4.0.X for sure, probably works on others as well.

Simply
1. upload image watermak.png in the forum root
2. Import Plugin AdminCP > Plugins & Products > Download / Upload Plugins > Import XML File

Then Edit Following lines, then Activate plugin.
AdminCP > Plugins & Products > Plugin Manager > edit "Image watermarker"

Edit this line to match your watermark file:
$WATERMARK_PNG_FILE = '/home/bbindo/public_html/watermark.png';

ATTACHMENTS MUST BE IN FILESYSTEM

Enjoy!

I've been waiting for this for very very long. Thank you before install.

Can album pictures be included, too?

it works, thank you.

doesn't work for me I have the png file in the root folder of the forum eidted the plugin as well and have it activated

I need it for albums aswell

Also this doesn't permanitly place a watermark correct?

Installed and working fine ;)

This is exactly the same as this mod: https://vborg.vbsupport.ru/showthread.php?t=112829

I had it installed on my site and it worked everywhere it needed to (Articles, Albums, Attachments) But I was getting some really funky stuff on the article uploads with bottom halves of the images being cut off, some not displaying period (red X's, that brought the images back when the plugin was disabled), and some other general funkyness. I ran it for about 3 weeks before I finally turned it off because there was too much un-explained behavior associated with it.

Great works o albums too. But just to make sure, this doesn't put permant watermarks do it?

No. When I removed the one I linked (same thing line for line for code, I compared them) everything reverted. All it does is use GD to overlay an image you specify in a position you specify. Hint (bottom left positioning, actually positions the watermark in bottom right)