I recently completed Pablo Dominguez's (https://www.artstation.com/pablodominguez) Learned Squared Course on Vehicle Concept Art. I learned a ton and had a lot of fun.
Here is the first of my three final keyframes (I'm including the other two for ease). I was obviously going for a Star Wars Vibe and this was a great opportunity to experiment. The majority of the ship was sculpted in Zbrush with some of the greeble pieces being designed in Blender. The platform/interior was created in Blender. The renders are taken directly from Octane Renderer. Paintover was done in Photoshop with the help of some photo textures as well.