The span of the sheet effect is greater than the span of the rendering pass, so when the pass just misses the polygon it doesn't recognise the sheet effect and doesn't render it.

There is an overlap between passes designed to reduce this problem, but it isn't always large enough. The best way to get rid of most of it is to increase the span of the rendering pass.

Type EXPORTSETMPPP and hit enter. The command line will show you a number. If you haven't ever changed the setting before it will be 4000000 (four million). Type 40000000 (40 million) and hit enter, then try again.

No that's a good idea. Have you thought of making it a more pale yellow? It will show up a little better.

I can remember doing something similar myself a couple of times.

Ok, I made some more snowy trees and messed around with the lights and the sheet effects. Now I think I need to make some people, or something. The centre feels a bit empty. Those are just scribbles I've placed at the moment.

Yes, it is a nice shape isn't it, but my goodness, that's a very wiggly coastline!

How about making some of the lowland bays a bit smoother so there's a bit of contrast with the wiggly bits?

Other than that it looks really good.

Ok. I've had a rethink and gone for much larger scale.

This isn't finished. It's just set up ready for details and possibly snowy rooftops.