The MERP books I wrote were Ghosts of the Southern Anduin, Hazards of the Harad Wood, Rogues of the Borderlands, and was a primary co-author of Gorgoroth. I also had a Space Master and Shadow World book as well.

I can check the tiling issues as well. The Swamp function and the forest function seem to draw a set of symbols on the symbol layer, and a background colour on the land features layer. The only thing is that the swamp symbols don't seem to be available as just a standard symbol set, while the forest symbols do. I could do some experimenting and see if it is possible to play with it. I think the challenge is that the Witchlight Fens in the Nentir Vale are so large, and the swamp function in the Fenlon set isn't intended to be quite that large.

As for the forests, I suspect that the cloning tool in photoshop will be my friend to reduce a lot the tiling look in the forests. I'm not sure if there'd be a different way to do it by creating a textured fill.

Thanks for the rep, BTW.