Over the past week I've been working on another bit of terrain in XNA. This time it's quadtree'd which basically allows me to render vast amounts of terrain with minimum computing power. It also has various different levels of detail per node which allows me to render detailed land up close and only several polys per node far away. I've been receiving good results so far, averaging about 800fps with 1 million vertices. As soon as I add multiple terrain layers (I have sand, grass, snow and rock) it takes a hit though, as well as trees. Anyway, here are some shots from the current version. There are unfortunately some seams between different terrain patches as the LOD changes.
Comments, as always, very welcomed.