Collision Detection

[Kafeen]

I dunno if it was just my computer but while im walking around i saw other players like walking over obsticals and walking through parts of walls, so maybe collision dection might fix something like that or does stuff just need calibration?

Its due to how often the server updates the positions of players. You can't get everyone's new position every frame so the game interpolates between their current and previous position to move them. If they're moving in a straight line, that's fine, but when people go around corners or navigate an obstacle, that can result in players going where they shouldn't.