Hello Brother,
I have reviewed your work and agree to solve out your issue, I am using Cinema 4d from last 3 years. Your issue is in rendering that you are not using exactly lightning, GI(global illumination) and ambient inclusion as per the ratio in which you should use. OK don't worry I can solve this out. Just hire me for this project and I will do this job for you. we might be discuss about this through Chat.
Many Thanks,
Sikandar