well...im digging the background of ur sig...but the only thing it needs is..a c4d render..just download some..and see which one u think is best..
then put it in a new layer..then change the mode of that layer so that is blends well with the background....and then just mess around with the mode until u think it looks awesome...
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then just work from there i guess...i dont really know any more tips...since im still not one of the pros of nb :ghehe:..good luck bro xd