wonderfull work! that last tank really looks fantastic, and the drawings are coming along nicely When you are drawing armor and cholthes try to think how they would work in real life. I noticed this guys elbow-pad
the last still life looks great, but its also SUPER dark! I can barely see the details on the beetle.
some nice reflections in there, and the highlights are sweet just try do blend the shading some more and this will look awesome!
Coooool anti aircraft gun concept! Nice clean lines and everything.
you could try to color it in photoshop, try fo make it look like a real thing
On the color studies always remember big to small. large brush strokes to small ones. And maybe sett a time limit for how long you will spend on them. Its easy to forget the time and spend hours on on tiny painting. also, try not to zoom in.
creative stuff! but your proportions are way of sometimes, You should do some quick gesture studies. 60 sec maybe, do hundreds of them, and try to thing about the anatomy when you do them. Look at where the elbow is compared to the navel, and where the hand is compared to the knee and so on
the quick poses is a good idea, the thing you need most work on is proportion.
Your anatomy is pretty good
Do some longer ones today, 3 min maybe? and focus on the construction, don't worry about how it looks. If you think it looks horrible you don't have to share, but its nice if you do