Double Edit. Making it more clear what I am after.
Mainly on iPad it is difficult to estimate HD formats, as it is added from invisible area outside screen left and right. Much better would be a crop on top and bottom and a visualisation. To see what will be cropped an optional overlay would help. In this case retina to 16/9 ratio.
A custom ratio input for rendering i.e. square format (for matcaps, Instagram etc.) would be lovely as well. The overlay must be calculated by Nomad, checking device screen ratio and turning it into a 16:9, 4K ratio.
If this is touched, an optional frame and two more tools for composition will lead to better results.
Here an example for perfect golden ratio:
It looks like the next update might support transparent PNGs for reference images. So you can probably do something like this yourself by creating a custom PNG.
But since there’s only 1 reference image, you’d probably have to chose between reference image or ovelay then.
No, unfortunately not. On iPad, the screen height is taken as reference for any other ratio than 4/3 render.
That means, the invisible area outside screen will be added to achieve 16:9.
An overlay can’t help in this case. That’s why a crop on top and bottom would be cool.
If so, it would be exactly like you said.