1- good effects, although the render doesnt really blends too much.
2- great concept, looks pretty neat, a bit less sharpen would make it look cleaner
3- awesome effects and focus, looks really good but the background is kinda poor.
4- dont really like it, the render is full of sparkles, the c4d+background doesnt show any kind of flow and the font is kinda poor placed.
Hmmmm, it took me awhile to find the render lol, so it kinda blends alot with the background, but it looks good, the c4d is great, it feels harmonic with the sig, the font style doesnt really suit the sig too much, i was thinking in something sharper and bold to suit the "hard theme", and i think you could do better with the background, it feels somewhat boring and out of place. overall i feel its a 8.2. Great work