I guess this is Robot Wars meets Game of Thrones? I can’t believe it needs any more of a pitch than that. Honestly now that I’ve written it down, all I want to do is draw robots holding medieval weaponry.
This particular one came together pretty quickly. Some quick sketches, a bunch of noodling in Blender with Grease Pencil, and then a render pass in Photoshop.
Again, Grease Pencil helped a lot to establish the form of the design. I find it super useful for any project where I might need to provide turnarounds or a blockout. Being able to grab some renders of your 3d drawing makes the whole process a lot less tedious.
You can even export the drawing as an FBX, and hand that off along with your concepts, so the next person in the pipeline has a 3D reference inside their modelling package of choice.