V3M files are associated with Minecraft, a popular sandbox video game. Specifically, V3M files are used for Minecraft schematic files, which contain 3D designs or structures created by players. These files can be used to share custom designs, maps, or structures with others.

When you download a V3M file, you are essentially downloading a Minecraft schematic file. These files can be opened in Minecraft using specific mods or tools, such as WorldEdit, which allows players to import and place the designs in their own Minecraft worlds.