Not sure where is the C4D at exactly, If there is one, It could be the little white dots? Anyway, Text is not impressive at all, Renders aren't rendered with caution, the background is acceptable, however, with such a background, you need to do more studies of the light, and where it should come from. Since usually, in the space - i think the BG represents the space - the light, if there is one, should be equally balanced from all directions, or strictly visible from the middle of the signature, that's to give the feeling that the space behind them is giving all of the light, of course while concerning the renders location.