We’re currently have problem in a project (public VR demo ttaking place on monday…). All the static meshes show ok, lightmap is ok (even though rendreding is looooong since we have a lot of objects in the map, about 26k, most of them instanced, so it make 384 base meshes ).
From time to time, and only for a series of static meshes (instanced and parent mesh), this very static meshes (roof tiles) do not show anymore on screen. They still are physically in the scene (actirs are “here”) though not visible (they are tagged renderable in game and visible in scene). Weirdest thing is that they still reflect light (radisity effect, white walls near the tiles are slightly colored due to the color of those tiles reflecting ). The “roof tiles” material is checked double sided since those tiles have only a visible face facing on the visble side. Normals are ok (I am in charge of the modelling process and I pre-load and check every scenes on my station before delivering them to my colleague). Light map resolution if ok (I render some parts of the scene from time to time as well).
When this problem suddenly appears it seems we have no other choice but deleting the map, emptying the cache, the “save folder” and so on… It’s no a satisfying way to do things though and pretty time consuming
Any idea on this problem ?
Thanks a lot for you help on this urgent matter !!!