Here I am working multiple characters, perspective, and shading. I can already tell im starting to get my skills back. Maybe in a few months ill return to where I was when I did video game concept art.

mini tutorial - bullet exercise

A lot of drawing tutorials have you draw cylinders, cubes, etc. The cube is ok but otherwise you just dont use that stuff much. But a bullet - a shape that is straight then curves - is useful.

Pay attention to shading and do at least 5-10 variations and see which are best and try and figure out why. Review 3 point lighting if you need to.