i heard a phenomenon from a friend. he said it was present in v1.0.0.5 he encountered it when i guess in 2002. he said if you will noclip from the level for a while -i guess directly up or down, he said you will be see another copy of map. but not with the entities. if you noclip back to where you came as with repeating noclip exact count again but in the other way, you will be see again original map with entities.
this type of thing occurs in quake engine too for example if you noclip down from map then close noclip and fall to void space, then game resets player on way high above the map and after continue to fall youll hit map again. if you miss landing to map this sequence repeats. and it makes ilusion of falling infinitely with seeing map from above after falling few seconds. but every time you envounterred with same map again, different from half-life phenomenon.
i cant find this version of game. i dont have this version to check and i wonder maybe it is true and maybe it is a corrupt version of quake's fall reset system. anybody knows this too? maybe you guys can help me.
my question, is this phenomenon true and why this hapens?
(i guess my firend also encountered fps problems back when he encountered this)