I found out where is a problem, here  is prefinal image without 32 colors limitation, which I set during save. This prefinal version has more than 32 colour by my mistake, so after save there are some color reduced parts as you marked. I never noticed that before. References used: photo which I posted below and photo of sunset to help me to create palette and overall atmosphere. I'll post a new fixed version, probably with smoother sky and some other parts to make this piece better.

Sure, I never save working steps, becose I use layers. I said, that it's not reduced photo, if you dont believe me, it's your business.

Maybe it looks like reduced photo , becose I somewhere use dither and somewhere not and sky is not smooth as should be. I also used tablet to paint sky, so its maybe another reason.

Ref was this photo from google images www.visitingdc.com/images/golden-gate-bridge-picture-2.jpg . Be sure that its not plain copy of any ref and so on .

tomic: What does it mean, reduxish?

Manupix: You are right, I could bring it further, I'll try to improve that piece. I tried to put cables, but it didn't look good.

Yes, photo, from which I could see how bridge tower looks like.