Various Sci-fi Consept Sketches, Weapon - Vehicle - Character

[ArtGoblin]

Been spending a lot of time getting my sketching skills up to a usable level.... Here's something I'm working on... going to have to fully work one consept of each and then the plan is to model it in very good quality.

Weapon Sketches:

Character Sketches:

Vehicle Sketches:

 

[Astopia]

Wow this is cool. Love the black sketches especially. What material did you use? Black ink?