Dude what happened to her legs? Also to people who said that negative space is bad. Negative space is actually pretty good for this sig.

Here is an suggestion when you put c4d sigs. First, put a gradient on the background that matches your render's colour. Then put the c4d on colour dodge, linear dodge, lighten or screen (any one of them that will make it look good.) and simply just keep overlaping the layers. This way it will give you a nice effect. In addition, erase many unwanted part. For example, the over contrasted parts. Also create a flow from the c4d renders, or at least try to.

Just some suggestions to make your c4d effects look cooler.