Quote - This looks a lot like self-shadowing to me, probably from ambient occlusion. Do you have ambient occlusion or ray traced shadows enabled for some of the lights? Try increasing the shadow bias and AO bias, that should fix it.

 

I was mistaken. I just tried several renders and it is only doing it with the AO (I didn't realize how much I have ingrained it in all of my light sets). I tried increasing the bias under Scene AO Options and it has solved the problem! Thanks, you have seriously made my day!