Beta update fixes hitbox bug

A major bug was discovered yesterday which caused inconsistencies between the client-side and server-side projection of hitboxes.

Valve have responded with a quick update, which will however not ship to CS:GO itself for the time being, as a new Beta option called 1.35.4.7rc emerged, supposedly created to test the new changes.

Alongside the bugfix, Valve have also aligned the first-person camera with the third-person model so that players cannot see from a higher perspective than where their head model actually is. 

Another important side to the update is a new way to counter spamming crouch to avoid bugs that appeared in the previous method.

The full changelog for the 1.35.4.7rc beta version of CS:GO is following:

[Gameplay]

• The first-person camera of players, spectators, and demo-viewers is no longer allowed to rise higher than their third-person head. This should prevent first-person players from being able to see from perspectives where their third-person head is not also exposed.
• When a player’s first-person camera is adjusted, bullets fired from both their client and server-side locations are also adjusted to emit from the corrected position.
• If for any reason the third-person player animation lowers a player’s head beneath the client’s first-person camera, the client’s first-person camera is lowered to stay at or under the height of their third-person head. This means that the third-person motion of the player is now represented more accurately from the first-person perspective.
• Third-person landing recovery animations are now weighted based on altitude traversed and duration in-air. Players landing from small jumps or falling from lesser heights will play more subtle landing animations.
• The anti-crouch-spam system has been changed to use degrading speed, instead of logging keypress-count. As before, the more often players crouch, the slower they will rise or lower. But this should now prevent bugs where players would instantly stand, or lose their crouch-spam penalty by moving a tiny amount. If players crouch even more, eventually they will just stay standing up.
• First-person and third-person crouch speed is now more closely related. The third-person player lowers more quickly to match the first-person representation.
• Players landing in crouch positions play a more subtle landing animation that raises their third-person head less noticeably.

[Misc]

• Lag compensation system will now reliably restore pose parameters responsible for animation layering which makes server-side hitboxes for lag compensated players better match client-side rendered models. (Thanks, /u/Spurks)
• Fixed a bug where player body pitch could improperly rotate the entire player entity inside lag compensation processing.

To test the changes yourself, you need to head over to your Steam library, go to CS:GO Properties, switch to the Betas tab and choose the "1.35.4.7rc" option.