Essentially the idea is a new or existing resource is used as paint on weapons. Friends can use it to have mock battles. It's pvp, yes, but without the obligation to partake. We could make bases for fortress combat; we could make combat arena's, etc.
As far as coding (which I know nothing about) it could be as simple as "if target would receive damage, mark as red for 9 seconds".
It is simple horizontal content that might grow legs.
Horizontal content like this could start as a small computer code, and then the player-base basically theory-crafts potential new content. Think Warcraft III (rts) custom game DotA and its evolution.
Your thoughts?
Source: https://www.reddit.com/r/valheim/comments/zxsp3d/valheim_pvp_but_paintball/