Masc, (Hallo Markus),
The 3D look comes from the microcontrast and CZJ lenses are famous for that. Take a look at this example here:
https://www.opticallimits.com/canon_eos_ff/508-zeiss100f2eosff?start=1Do you see how the white statue pops out of the scene? Just amazing! The same scene, shot with a different brand of lens of the same focal length does not provide this 3D effect. There are lots of examples on the above site.
A long time ago, I tested the 200/F2,8 for the Pentakon 6 on the classical 5D. The lens is large and heavy and a pain to work with due to the lack of life view on the 5D but due to the large pixel of that camera, the 3D effect was even stronger pronounced. And if you get the focus spot on, the colors and 3D look are absolutely gorgeous.
May I suggest that you try a few tests filming at different resolutions with one of your longer CZJ lenses, when you find some time for that? You may find that, dependent on the resolution at which you record the image with a given sensor, the 3D effect may be more or less strongly pronounced. In this way, you may find a resoluton producing the strongest 3D effect.
They should really make a museum for old vintage CZJ lenses in Jena, with all their lenses ever made on display, so that every visitor could shoot a few test shots with their own cameras using these lenses. They could make a lot of money with that.
