Update?

Via csgo_servers:

Server version 181 by default enables PVS for all enemies beyond distance specified in “pvs_min_player_distance” convar.
Rumor has it:

This update is OPTIONAL (for server operators)

At the moment, it seems unlikely that there'll be a client update at all

Potentially Visible Sets are used to accelerate the rendering of 3D environments. This is a form of occlusion culling, whereby a candidate set of potentially visible polygons are pre-computed, then indexed at run-time in order to quickly obtain an estimate of the visible geometry. The term PVS is sometimes used to refer to any occlusion culling algorithm (since in effect, this is what all occlusion algorithms compute), although in almost all the literature, it is used to refer specifically to occlusion culling algorithms that pre-compute visible sets and associate these sets with regions in space. In order to make this association, the camera view-space (the set of points from which the camera can render an image) is typically subdivided into (usually convex) regions and a PVS is computed for each region.

so with my little understanding on the subject is this a combat against wallhacks?

edit: as mentioned elsewhere by /u/Wareya could be a combat to radar hack. radar hacks are even harder for us to detect in overwatch since cheaters can't as easily line up headshots etc.

more edit:

i don't know anything guys i copied the info from wiki. there were a couple posts made by /u/peolorat and /u/emozilla a year ago. maybe we can summon them to explain for us.

en.wikipedia org/wiki/Potentially_visible_set