[sonikk4ever]

Scale /10

Suggestions are always welcome.

[Obli]

Well the render's elbows look cut off
The white and blue C4Ds do not seem to fit well because the environment is dakr in the tag
You should also work more on your lightning, light does not necessarily come from above, it can come from below, but in this tag it's simply obvious that you used a soft brush.
The text? I never place text in my tags so I couldn't possibly be of much use, and that gradient map you used doesn't reflect well on the darker parts of the tag.

[sonikk4ever]

Well the render's elbows look cut off
The white and blue C4Ds do not seem to fit well because the environment is dakr in the tag
You should also work more on your lightning, light does not necessarily come from above, it can come from below, but in this tag it's simply obvious that you used a soft brush.
The text? I never place text in my tags so I couldn't possibly be of much use, and that gradient map you used doesn't reflect well on the darker parts of the tag.

Thanks for your very informative comment, I really appreciate it. I indeed used a soft brush for the lighting from above.

The elbows may look indeed as cut off, but the c4d is in the foreground.

And for the other aspects that you mentioned, I will keep that in mind.

[Sasori]

you ahould understand the rule of the thirds before adding text
to monotone
why is the render centered? get a better one, this has no flow