Question
What is causing this color banding?
I'm not sure why this is happening. I am painting with a default soft round brush with pen pressure opacity. Canvas size is 2500px by 1000px, 72ppi. The image is set to 16 bit channel. I'm pretty sure I've done the most I can. There's even banding when I use the gradient tool. It could be possible I'm just ignorant and this amount of banding is normal (which would stink). Any help is appriciated 

