Especially with new created objects or after changing the material texture. This appeared already some time ago but happens now frequently. For a short time a solution was to exit to the character editor after loading the room file and reenter  the room editor. The system seems to write a cache file related to the avatar in this case. But since some time this workaround does not work any longer. Any suggestions? (PS: I admit the room files are rather big in size  ) beete.world