So this is a crop of one of the areas in question. This is with the render settings suggested by 3DFineries.

This is the layout of the lights, numbered (from left to right 1, 2 and 3 along the top, 4 in the middle, which is the specular-only light and 5 at the bottom).

Light 1

Light 2

Light 3

Light 4

Light 5

As I said before, this light set-up has done me many good turns in the past and I like the evenness and slight blue tint it gives to my scenes, so I would only be happy changing it if the change(s) didn't affect these factors.

Cheers,

Glen.

I'm running Win 10 Pro 32GB RAM Intel Core i7-4790K CPU @ 4.00GHz Nvidia GeForce GTX 1660 Ti

My DA Gallery: glen85.deviantart.com/gallery

Peace, love and polygons!