I am dusting off a few more of my old robot drawings, in this case a few from when I was using SketchbookPro on an iPad mini, and showing my digital art fairly frequently. I brought the image into Vizcom with a simple prompt and a color refernce to re-imagine the scene. 
Once I was happy with the 2d model, I tried a few version of 3d conversions and exported and then pulled the main robot into Blender.