General dedicated to posting and discussing art of either:
1. Manmade objects, vehicles, tool, weapons etc. (of any kind and any historical era, as long as they fall in the ballpark of "technology") and fictional derivatives of such
2. Objects,vehicles, creatures etc. that aesthetically fall into the visual space of mecha/robot/artificial/cybernetics etc. regardless of level of realism.
Helpful to mention the level of realism, if any, you are taking into account in the art.