This video is not mine though, so idk which console commands show it. I assumed that it has to do with some sort of external plugins, hence the coordinates thingy running on the side.

There's a command called "z_tank_rock_debug" which reveal the trajectory and "detonation" point of a tank rock when it collided with something, so I guess that one could be an ok substitute.

Finally, a mod that makes the game less annoying.
Anyways what is the console command to reveal the hitbox as shown on the video?

I can finally parry properly the tank rocks with that one mod that allows to parry projectiles

No wonder I'd still get hit by the rocks when I sidestepping even when its distance is about 1 meter away from me, your video explained how it works perfectly. Now I know what to do about this ridiculous setting!

@R4NK4Z I assumed that is Value's attempt at trying to make tank rock a threat by making it easier to hit the survivors, especially given the limited development time of L4D2.

Instead of modelling a proper hit box for the rock itself, they simply modelled the radius instead as it's easier + it does the work, even tho flawed.

I think the AI Tank having a near-perfect aim is another proof that Valve wanted the player to view the rock as a threat, even tho in that case they exaggerated it by making it near impossible to dodge in some situation.

makes me wonder what the point of that radius is anyway
survivors have a hitbox, the rocks has a hitbox - why add a magical sphere that determines whether or not you are hit instead of just letting the basic hitboxes handle it

It's funny to see it in action, especially on Expert. The rock hits an invisible object far from where you are and somehow you get downed.

@Ares not fixed per-se, just that it made the problem of rock sniping much less apparent.

it fixed tank rock?

My God, it all makes sense now.

Wow no wonder the rock always cheeses me. Thats insane. That video is very informative, thanks.