Collision Detection on Geometrical MipMapping

My model does not walk on the terrain.
How do I detect collisions on my GeoMipTerrain?

You can use Panda’s collision system (collide with geometry approach), just set the appropriate bitmasks on the terrain root.
Though, this is an inefficient and slow way to keep your avatar on the terrain. A better approach is given by the GeoMipTerrain, using getElevation.
To keep your player on the terrain, simply call this every frame:

player.setZ(terrainRoot, terrain.getElevation(player.getX(terrainRoot), player.getY(terrainRoot))

Replace the variable names by what you’re using.