But the second render I want to have Y resolution the same with X resolution bigger to contain all 3 cubes. It's logical that I should just increase X resolution. But when I do so it makes the rendered area SMALLER not bigger!
What I need to do now is to move camera up by Z axis and have a painful guessing game trying to catch the same number of pixels for my geometry on both renders.
I added the red rectangle in the middle to make it more visual. What I'm trying to achieve is to have the same number of pixels for this red rectangle on both renders. It's important for me as I plan to use PNG images with transparency as layers in another software so the scale should be perfectly matched.
The way I fix it right now (make render, send it to Photoshop, see if I need to zoom in or out to match the scale and make it again) is very annoying and time consuming...
So I'll be very grateful for any help or advise!