This is a unique custom terrain map that is a swampish area combined with a beautiful forest biome. The hills are smooth, the trees are tall, and it makes for great scenery. There are lots of types of trees; shorter ones in the water, and taller ones on the land. Each tree appears to be custom made with a software such as WorldPainter or similar. The transition from swamp to regular forest is natural looking, which makes for a really nice effect.
Hallis is a Bedrock Edition content creator that works for DarkSide