JosP

The image size is 7000x7000 pixels.

I have now, but the files I'm loading are really quite small and their is about 2GB of free RAM on my system. I'm not sure I'm loading the PNG's in the proper way though. I first open the bottom one, and then use the import from file menu option from the Layers menu. Is that the way to do it? This is the point where I get the error "Not enough memory to load the image".

Hi, I've tested Paint.NET with loading several PNG files as layers on top of each other. The PNG's are partially transparent and together form a geographical map. Doing this I get the message that there isn't enough memory to complete the operation. But it's less than 3 Mb of data and no more than 3 or 4 files. I suspect an OutOfMemoryException is thrown from somewhere in System.Windows.Drawing namespace. Yes, I'm developing an PNG-viewer application using the same technology as Paint.NET and get the same error :-(. So I thought to check and see if Paint.NET could handle this operation and maybe I was doing something wrong. But apparently you are facing the same problem? Regards, JosP