Digital Art New sig - I actually tried this time

Yep, I actually used a tutorial and tried to make a decent sig. Have I improved slightly?

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It's Ironhide from the Transformers movie. CnC, please.

 

There's a couple things I would fix on this, like the yellow lighting. I would tone that down a bit because the brightness hurts my eyes. Also, the render is too dark. To fix that all you have to do is make a new layer, brush over the render in white on the new layer, then sat that to overlay.