Volcano Skip

2026-05-06T16:16:36Z

Xyphles: Baseline entry for volcano skip, only covers the final revisions of the skip and doesnt go into the previous iterations with the proxy in the no oob category, its discovery by bin, or contain any visualizations yet

'''Cave Skip''' is a skip in [[Jak 3]] that allows Jak to enter the Monk Temple earlier than intended. Doing so allows Jak to trigger the ''Find Oracle in Monk Temple'' mission earlier than intended, resulting in a [[Percentage Warp|percentage warp]].

= Technical =
There are several versions of volcano skip the most simple being the one used in the Any% category at the beginning of [[Temple Skip]]. In the starting area of the temple during the mission ''Climb Monk Temple Tower'' there is a decorative pillar along the rock wall of the mountain that lacks collision at the top. Runners clip through this gap after bouncing on a trampoline and boosting themselves up with the Wave Cuncussor then navigate out of bounds around the door that normally blocks the player from entering the temple until completing ''Find satellite in volcano''.

In previous routes of the [[Any%25_No_OoB]] category however we had to do a more complicated series of steps to achieve the same end goal. Jak ignores collision while he is getting off a ledge in his <code>target-edge-grab-off</code> state but to take advantage of this and clip through the temple door we need to get the dune hopper vehicle inside of the temple. The developers wanted to make sure you couldn't just simple drive the car into the temple presumably because upon entering it the desert would deload and despawn the vehicle. To prevent the player from doing this they added a gigantic wall of vehicle blocking collision in front of the entrance. This wall is just barely able to be bypassed via careful platforming along the rocks on the left side of the level with the dune hoppers jumps assisted with carefully controlled boosts to help position and angle the vehicles momentum in the air. Once the car was over the wall runners would then drive it to the entrance of the ''Climb Monk Temple Tower'' mission and exit the vehicle. Once on foot runners then readied a double stacked Wave Cuncussor shot to push the Dune Hopper inside the temple. Runners then entered the temple and started the cutscene for the ''Climb Monk Temple Tower'' mission, this cutscene moves jak over near the entrance to the temple bypassing the camera based trigger that deloads the desert and despawns the car in normal gameplay. After skipping the cutscene runners could then drive the car and position the back boost exhaust port slightly infront of the temple door leaving a small gap jak could enter and get a ledge grab. Then runners could hold back on their stick and press x to get off the ledge and briefly ignore the doors collision while in the <code>target-edge-grab-off</code> state and entering the temple early without leaving the bounds of the level.

= Discovery =

{{Skips}}

Cave Skip

2026-04-29T17:05:35Z

Xyphles: Baseline explanation of how cave skip functions. needs more work, visuals, more detail, etc.

== Cave Skip ==
Cave Skip refers to entering the metal head infested cave in the desert early and Percentage Warping to the mission Destroy Eggs In Cave earlier than intended. This glitch is primarily utilized in the No Out of Bounds Restricted category.

== Tutorial ==
<youtube> https://youtu.be/QcjKdZ8FqVk?t=833 </youtube>

== Technical ==
Throughout the years there were various methods discovered for bypassing the egg wall that is supposed to block your entry into said cave most of these are now obsolete but one method is still utilized in the No Out of Bounds Restricted Category. This variant works by wedging the Tough Puppy vehicle into the bottom of the egg wall. The entrance to the cave has no level collision blocking it, the developers instead utilized an actor that has its own collide-shape-prim-mesh which allowed them to cull the actor after the cutscene of Sig destroying it with the peacemaker played. When you wedge the tough puppy vehicle close enough to the wall the collide-shapes of the cars tires slightly clip inside the collision of the wall actor's collision sphere. Theres a method the game uses to avoid actors clipping into each other like this called [https://github.com/open-goal/jak-project/blob/36d8213dfbb10c15e3537b6347e8414185084c6b/goal_src/jak3/engine/collide/collide-shape.gc#L2333 do-push-aways] which runs after a should-push-away-test succeeds. If the car is positioned correctly this can push the wall actor far enough away to leave a gap between where it used to be located and the main levels collision big enough to drive the car into the cave and make your way far enough in to hit the trigger that Percentage Warps you to the Destroy Eggs In Cave mission. One minor version difference to note is that at the time of writing on Opengoal the eggwall only seems to be pushed to the left leaving a gap on the right but on PS2 and presumably all other console versions the eggwall can move either left or right and leave a gap on either side.

Jak Speedruns Wiki - User contributions [en]

Volcano Skip

Cave Skip