URP-E3D MeshPainter is a terrain painting tool for Unity. It allows you to make detailed edits and paint on terrains. If you have recently purchased it and are unsure how to use it, I would recommend checking if there are any tutorials available on the official website or forums. These tutorials can guide you on how to use the tool effectively and achieve the best results. Additionally, you can seek help and exchange experiences with other users in the community. Enjoy using the tool!