Radius Material Change

In Game I want to have a radius that within it changes the Landscape material within its radial point.

The idea is to have a campfire in a snowy game and any area of landscape within the campfires Sphere collision has a different material.

Ive tried looking online for any documentation or tutorial videos but cant seem to find much on it. If anyone has any clue or who can point me in the right direction id be very grateful

Take a look at ‘material collection parameters’. You can choose a point and make the material change at that point.