Hello i need help i not know why my unity generate light very long load pls help me i waiting 15 hours and not canceled generate i have in scene only 18 building and one car one reflexsion probe one Direction light... PLS HELP ME
Hardware performance and complexity of the scene affect bake times. A scene with "18 building and one car" could be very simple, or somewhat complex, don't know. Baking does very well on a computer using SSD drives, a good amount of memory, and a fast CPU with a good number of cores. If that doesn't describe your computer then expect baking to take significantly longer than it otherwise would.
My current project I only use real time lighting, but the last project I used baked lighting for what I know is it would take 4 hours to bake. I did a big upgrade on my computer (went from 6GB RAM to 16, new generation CPU with 6 cores instead of 4, and replaced HDD with SSD) and dropped the 4 hours bake time down to about 10 minutes. So that's my anecdotal experience.