Hello, Lets assume i have level build with only rectangles (floor and walls), is it better to use plane as prefab to build such level or 2 triangle mesh + mesh collider for each floor and wall ?
I would build them out of a mesh that you make yourself. This way each plane only has four vertices, five edges and two faces. This is better than the default unity plane. If however at somepoint you want to impliment shattering or breaking the unity plane would be better.