So, I'll try to make it as clear as possible but I just started working with OpenEXR MultiLayer Output and I might miss some important info. Important to know I render with Cycles.
I'm working with an interior scene that has Depth, AO, and Noisy Image passes. I started rendering with a render farm (GarageFarm) to avoid long rendering times. They told me that to keep the passes, I should set the Output as OpenEXR MultiLayer .
I did as they told me to and got a .exr file that has all the different passes as I wanted to. I open this file using F11 to open rendered image, I go to image, open, and double click on the .exr file. After doing this I can choose between the different passes and they all look as they should. The problem is that when I want to save one image (clicking image, save as) the program simply does nothing. I can't save the different passes as .png as I would want to.
I don't use the compositor because I find it really confusing, I prefer getting all my passes as png and simply post-process them with Photoshop, so if I could avoid using the compositor for this I would be happy as a cow!
Important info: I don't open the .exr file directly on Photoshop because I like to do the color management in Blender first.
I hope I made myself clear, but if I'm missing something or you need more info/screenshots/whatever, please let me know!
Have a great weekend!