My first seed was on Ice Waste Land, than I found that marsh both massive... I think it was a bug they fixed; atleast how big the biomes were; most biomes are of normal or as close as normal as they could get,,, I gave up on that seed as soon as I got sick of hoping from grass tile to grass tile, cheated myself a jet pack (I think about 6) and flow over the marsh just to see a biome with no trees what so ever, my next biome was just flat with trees (forested hills?) it was way to big decided to let themup date, now I have a seed with redwood forest, desert, and rolling hills, still a little bigger than what I wanted but it'll work for now.