This is badly out of focus but gives an idea of how I want the underside of roof to look, I will take a better one and upload it.

Shot showing how the rafter details ended up. Going to keep it that dark grey coloour but give it another coat. I'm either going to paint the underside of the OSB the same or maybe use some battens and put some thin T&G up there.

Shot showing how the rafter details ended up. Going to keep it that dark grey coloour but give it another coat. I'm either going to paint the underside of the OSB the same or maybe use some battens and put some thin T&G up there.