external vs internal lightmapping?

Unity Engine
1

hey sry if this is answered somewhere else…

is using the legacy external lightmapping more expensive for hardware then the new unity built in lightmapping?

basically unitys lighting isnt up to par with lightmaps i can create from max

my scene is starting to lag and im trying to find where to cut corners at the cost of quality 8( lol

2

Did you set up lightmapping resolution properly on your meshes?
In example, you can have low resolution for terrains and external meshes, but you need a bit higher resolution for inside buildings.
This can help a lot in optimization of large scenes.