Currently (and I think this will be the final version as well), I'm using 3 textures:
One is the big 2048^2, for the hull (I painted this 4096^2 and downscaled, for better panel anti-aliasing)
One is the pink tanks.
One is a texture from the Orion (Capital something-something) with a lot of pipes and wires, for filling up the 'in-between' of the tanks.
That's it.
And yes, I guess I can reserve something for a nameplate. How do I do that? And where do you want it? I'm thinking somewhere in the rear...?
Is it possible at all to consolidate any of those textures or optimize the placement of the texture elements to reduce that number at all? Even if it is just to copy the wiring details from the orion map to the tank map would be great if at all possible.
If not, understandable. However, I would recommend copying the texture used by the orion and renaming it to something specific to the Zephyrus in the event the orion model or textures get changed. If you have not done so already, that is.
A nameplate texture is 512x64, currently. Science Vessels use 256x128. Black background, White Text. The text is then repeated in the Alpha channel at roughly C9C9C9 grey. Current format is in DXT3, but being re-evaluated.
Model wise, you just need a rectangular section that loads "nameplate" as it's texture. Good models to example from would be the Deimos, Fenris or Leviathan.
As for where to put it, a possible place would be the mid-section that the dorsal comes down off of. You have the recessed mechanical section and just below it appears (from the provided shots) a great place. If I had a direct side shot of the textured model that was solid lit (F3 Lab, No Lighting selected) then I could guess better.