@Max - Thanks. I will check the origins of the rivers a little more carefully. Colours, yes, as mentioned, I want to work more on the colours and shading. Overlapping trees, Yes, starravens brushes dont do well - I wish the 'inside' of the brushes were not transparent. I am considering not using the tree brushes (they are not as good as the mountains) but I have yet to find a style for trees that I am happy with...

@Arsheesh - Thanks. Lots more to do.