In Bakery? What features exactly do you need apart from directional lightmaps (which are coming)?
Bakery is designed with low VRAM in mind:
If will cache stuff on hard drive to prevent going out of RAM/VRAM, and this specific optimization allows it to only store a very limited dataset in memory (stuff in lightmap being processed + compressed stuff that is visible from it).
If you have GTX1060 or better - good luck hitting the VRAM limit 