Hi all, :) thx for critique, nice!.... sry for later...i have much work..... about scale, in the next frame I will go to place a human being to the side

Single sealled teeth meet salad in full combat readiness.
Who else as not "Maschinen Krieger" , what can withstand the onslaught a vegetable?

siteniz çok güzel ingilizce bilmediğim için özür dilerim

No, it's the "nazis in space" power armour suit model from Nitto's SF3D kits "Maschinen Krieger".

http://www.hlj.com/product/NIT24098

I like the pseudo historical genre (reminicent of the asthetic in "The difference engine").
I agree with Ariphex about the scale, but I think to add another 'element' may lose the sense of isolation.
Instead I suggest removing a portion of the side wall to reveal the trees outside.
Perhaps the scale could also be defined by the lighting scheme?

Either way your art has a strong narritive, well done.
I look forward to seeing more of your work.

Quite good work, attention to detail is very high and that gives a very realistic overall effect.

However I would suggest that you add an element close by to the robot/armouredman, so that we can determine its scale. At the moment its quite vague whether your character is human size, or something much larger.

Well done on the rest though!