This is all-too beautiful and eye-catching! I love how the machine looks.
To help you improve, I got some tips: Smoothen out the light reflections on the cylinder shapes of the machine. It will make the texture much more smoother and metallic.
The men that are doming down from the machine needs more detail and the light source needs to be smoothened out on them too. The closest man to be darkened up too, because there is too much light on him. The lighting is like he's near the light, but far away from it. Think, for example, of how the moon shadows the sun during the eclipse. If the moon is further away, the light won't affect it that much. If the moon is nearer, more light will envelope it.
Hopes this will help you out! I did try my best to help.
The composition is actually very good.The only thing I will say is the floating dude is on the same level as the green core light thingy...it would have been better to offset that up or down from that position. It would have created more dynamic tension that way. But the overall lighting is incredible. Probably make the guyhigher that would keep the eye moving around the painting.
this is great. only thing i could think of to improve it would be to add a lil bit of wires on the bottom right and maybe the left coming from the extreme foreground and leading into the mid background to add more depth and to give the light a substance to bounce off of.
Humm, I agree with AndreeWallin, and would in addition to that say that you could maybe add some visible consoles around the room under the screens, and maybe some ppl working on them, aswell as some extra machinery or stuff/cables/misc under the core.
Other than that I have no advice.
Are you going to refine this picture? Maybe even expand it?