Yeah that is an artifact even from my old game "Desolate dread" I think it does that because the renderer needs updates to write or because it doesn't use a skybox yet
wait really? in all my testing there is was no way to get in the void. and sorry i couldnt implement the monster yet just because i was busy with it for 2 days (1 for coding and 1 for textures and moddels i have the AI implemented but not any models so it was scrapped for now)