Forced Camera Near Distance setting isn't always applying directly. changing it from forced to anything isn't applying the setting.
  1. Go to a world, ex: https://vrchat.com/home/world/wrld_38646e89-6117-48a9-aab9-aea64c1cd629
  2. Look at the skybox
  3. change Forced Camera Near Distance to Forced (if it isn't yet)
  4. change Forced Camera Near Distance to anything else
I would expect to see the skybox but it's just black. Rejoining fixes it.