Godot 4.0 will get a new, modernized lightmapper
Mircosoft Game Dev
MAY 8, 2020
Lightmaps offer significant advantages over any other technique when the following requirements are met: Performance above anything else (for mobile, lightmaps are still a must-have). If these requirements are met, then lightmapping is probably the best for you. Lighting will not change (lights won't move). Easy to use.