Lighting/HDRI tests!!!!

Now for something new.  I've been learning the program cinema 4d for a while now and i've finally decided to work on my lighting skills and environment design skills.  Below are a group of practice renders using environments either photographed by me or in the case of the first image, drawn by me.  I bring them into the program as a texture for the sky in the luminance channel and warp them to cover the inside of the sky sphere.  Sadly, I think the drawn image ended up looking the most realistic.