Overview
If you have experienced black doors, windows and other prop_dynamic problem when creating a map in HL:Alyx SDK (Source 2)
How to fix black prop_dynamic in source 2
Lightning was always an issue in source 2
static props (prop_static) lightning information stored in ‘lightmaps’, but prop_dynamic light info stored in entitys ‘env_light_probe_volumes’ or ‘env_combined_light_probe_volume’ , so if you notice that your dynamic objects such as doors, doorknobs, handles, windows are black — probably you forgot to add these entyties on your level.
More info about these entities and how to fix this problem you can found here:
[link]
I have spent enourmouse amount of time searching in internet about fixing black doors, etc, so I want to share my knoledge, may be you may found it relevant to your problem