Begginer ask about lightning

"Why do it take so long ?"




I follow a lot of lightning tutorial on the net, and docs of unity, and still huge issu to optimise lightning. Here, a simple scene. Baking time taking 45 minute on an i7 8700k.

This is a basic terrain, with some texture, 3 light (only one directional). All the prefab are placed manually excepting the grass, who is paint with terrain tool.

terrain is on verylow light preset :



Lightning global are also on "low setting"


no light prob.

Look like if i misunderstanding something, can you help me on this point ?