This model is a rough 3D sketch for a Star Trek starship. This starship is a late TOS-era defensive ship meant to carry large quantities of photon torpedoes. Her design was based partially on Thomas Marrone's Pioneer Class Starship (https://www.artstation.com/artwork/emnW3), and takes some design cues from TOS, Discovery, TMP, and the USS Kelvin. I am continuing to advance in my CAD skills the more ships I model, and I am happy with the end result of this model. Regarding the materials, SketchFab doesn't support Blender materials so I simply remade them in the SketchFab 3D editor.
Frigate Class w/ Materials
Frigate Class Starship