im using 4.9 and I have a light mass in my level and all that and made sure my drivers are on but ever time I try and render it always gets stuck at building the light at 97% any help please
Hello revnance,
This was a known and reported issue and has been fixed in an upcoming release. To check this, you can try upgrading a copy of your project to the 4.10 preview 2 engine version, and run lightmass.
Thank you,