I am searching for a better skybox solution also. i spent 12 hours cooking a lightmap only to have 72fps when looking down with the headset on the OVR metric tool only to have it drop to 30 when looking up past waist level. I'm pushing 90fps in the unity editor. Looking back at my other builds I bet this situation made me ditch a few projects because its not something to you readily think of once the xr rig starts stuttering. Looking for a solution for this.