Combining several images into one - how?

I rendered out (12) 2048 x 2048 images. Now I need to combine them into 24576 x 2048 strip in a particular order, while flipping them horizontally and rotating 2 of them 180 deg.

I figured if I load up all 12 images individually, I can use flip and rotate(?) nodes to transform them.

What puzzles me is how to combine them into a strip. I looked into it yesterday and tried using translate node, but that didn’t work - preview gets black and is still 2048 x 2048.

How do I do that if a most efficient manner ?

Thanks!

You have to increase the resolution in the render -> dimensions panel to your desired output resolution. Then you can import, scale, rotate and translate your images to fit your requirements.