Having a specific number given for the crown diameter is great - currently, it's 5.7mm, up from being originally 5mm. The smallish crown is due to it being designed to be stunningly thin with a slim midcase, so to keep symmetry, avoid overhang and overlapping the bezel, I set it at 5mm initially. I upped it in response to more people confirming my feeling that the crown looked disproportionately small and possibly fiddly to use.
I'm not likely to do an oversized crown such as with Nick's Orion Calamity, as I feel that doesn't match Atlantica's sleek angular look. But I think I can upsize it to 6mm, or 6.25mm, depending on the final thickness of the case.
The dial texturing on the Have-Blue variant is a light etching of the logo in tessellation. It's more subtle on the earlier rendering above (then labelled Seafarer), perhaps due to the more strong navy blue color on that versus the more light-water blue tone it is now (plan to adjust that). It's probably not for everyone, but I thought it might produce something different.
I'm expecting the Nero-Noire variant to be popular given how people like black divers in general. I think in real life the combination of a matte textured dial with a lightly glossy finished chapter ring will be both understated and contrasty at the same time.
For the original black-blue variant, I'm hoping to be able to use the kind of inky black look for the main dial that seems textureless (think Chronotechna or Doug's No.4) to really create a blank background for the dial details. For Silber, I want to use something akin to automotive metallic silver and a black ring that has a blue shine to it.
Being eye-catching and aesthetically different is what Atlantica's all about - it has no references. I really am hoping that I can bring something different and new looking with it, hopefully.
Latitude on the other hand is acknowledging the vintage trends, yet not paying tribute to any one famous watch. If you have something to add on it as well, I'd love to know.
In regards to the software I'm using, I'm working with an industry standard CAD package that has an iRay renderer included, plus I do some light post-processing in the typical raster editors if needed.