Factorissimo adds factory buildings to Factorio. Place them down, walk in, build your factories inside!
Mods introducing new content into the game.
When the belt speed is too high, materials get stuck outside the building, and come inside little by little, it's frustrating, I mean, the point of a high speed belt is moving materials faster
Correction, I found out for some reason belts connections don't work properly with Ultimate belts mod(https://mods.factorio.com/mod/UltimateBelts)