Hi, I was also searching for something similar & came across this article on dynamic vertex painting: Dynamic Mesh Painting in Unreal Engine 4 | raywenderlich.com. It’s using line trace, but it might be helpful in your case too. But if you already have your own material, then yes, you can use the projectile’s Event Hit, and use its “Other” & “Hit Location” parameters for painting at the projectile impact location.