Thanks for the C&C everyone.
Daft as it may sound, in my mind, I had the scale of this as it looks (eg. the "mountains" to the left about 5' - 6' above the level of the water etc). Eeeee, when I were 't lad I used to go swimming in a place a bit like this (It didn't look like this but the pond formed in a glacial "scar" The pond was about 8' deep and the surrounding rock only rose about 4' above the water level) Anyway, looking at this with everyone elses eyes I can see what you mean, but it looks about fine to me

Mohawk, the atmo looked fine on my smaller test renders, only noticed this myself on completion of the large version, but was too lazy to re-render

Miles