Exit List Index SRM

Discovered by Rylie

Similarly to owl statues, the actor parameters of many other actors are used to index an exit list. However, unlike owl statues (in which Song of Soaring or the file select screen sets the new entrance), these other actors set your entrance directly. By manipulating the actor parameters (offset 0x1C), or another field, of various actors that set your entrance, it is possible to wrong warp to a subset of locations depending on the actor and the scene.

Woods of Mystery "fake" loading planes

The Woods of Mystery are composed of a 3x3 grid of rooms. The path between the rooms varies depending on the day.

   Day 1              Day 2              Day 3   

6    7 <- 8        6    7 <- 8        6 -> 7 -> 8
          ^             |    ^        ^         |
          |             v    |        |         v
3 -> 4 -> 5        3 <- 4    5        3 <- 4    5
^                            ^             ^     
|                            |             |     
0 <- 1    2        0    1 -> 2        0    1    2

How was this achieved? In other scenes with day-dependent room layouts (such as beaver race), collision barriers serve to block you off from the unused rooms. But in the Woods of Mystery, taking a wrong turn actually sends you back to Southern Swamp.

Well, the answer lies in the loading plane actor (0x18, En_Holl). Byte 0x144 (the first Byte following the header that is common to all actors) of the actor instance sets the "type" of loading plane it is. 0x00 in that Byte will mark the actor for death. 0x04 marks the actor as a "scene changer". Anything else will cause the actor to behave like a "normal" loading plane (one that changes the room). Note that the subsequent Byte (0x145) sets the opacity, which means that clear (0x00) and black (0xFF) loading planes are exactly the same, contrary to popular belief, and the difference is purely visual.

The tunnels between rooms on the incorrect path are filled with these "scene changer" loading planes. They act essentially like loading zones (which are what's used for the tunnels on the periphery of the 3x3 grid). However, since loading planes are actors rather than specially-marked collision triangles, they can be manipulated with SRM. This is made much more convenient by the fact that the "fake" loading planes actually allocate with all the other actors in the room. "Normal" loading planes allocate before everything else in the room, which makes it impossible to manipulate them in a scene with only 2 rooms.

So how do these loading planes know to send you to Southern Swamp from Woods of Mystery? Well, it's set in the Actor Parameters (offset 0x1C), the same field we manipulate for Owl Statue SRM. Specifically, the low 7 bits of the actor parameters are used to index the exit list for the current scene. By default these bits are 0, causing the first entry in the table to be grabbed, which is Southern Swamp from Woods of Mystery. This exit list has only one entry in it, but due to the 7 available bits, we can index far past the bounds, leading to a variety of wrong warps.

All Actors that use an Exit List

There are other actors that set your entrance based on an index to an exit list as well. All such actors are conveniently posted here as a table.

ID	Name	Description	Exit List Used	Index Used
0x18	En_Holl	Loading Plane	Current Scene	Low 7 bits of Params (if offset 0x144 == 0x04)
0x38	Door_Warp1	Blue Warp	Current Scene	High Byte of Params
0x55	Door_Ana	Grotto	Current Scene or Grotto Overlay	Low 5 bits of Params or all 16 bits of initial Z-rotation
0xA6	En_Hs	Grog (Cucco Shack)	Current Scene	Low Byte of Params
0xBF	En_Js	Moon Child	Current Scene	Bits 0x03F0 in Params
0xFA	En_Ge3	Aveil (Pirate Leader)	Current Scene	Unknown bits of Params
0x116	En_Warp_tag	Rainbow Warp (Goron Moon Trial)	Current Scene	Low 7 bits of Params
0x1CE	En_Test7	Song of Soaring	Song of Soaring Overlay	Unknown bits in Params
0x1AB	En_Time_Tag	(kicks you out of scenes at certain times of day)	Current Scene	Low 5 bits of Params
0x1FF	En_Kgy	Gabora (Mountain Smithy)	Current Scene	Low 5 bits of Params
0x21D	En_Kaizoku	Pirate Fighter	Current Scene	Offset 0x2D4 in Actor
0x21E	En_Ge2	Pirate Guard	Current Scene	Unknown bits in Params
0x238	En_Zod	Tijo (Zora drummer)	Current Scene	High 7 bits of Params
0x27F	En_Bomjimb	Bomber Kids (during hide-and-seek)	Current Scene	Offset 0x2B2 in Actor

This is a spreadsheet of all the possible entrance values for Exit List Index SRM Wrong Warps for various actors.

Note that none of these warps are likely to be useful in a speedrun context, especially considering the fact that arbitrary wrong warps were discovered in the form of Grotto Overlay SRM only a day later. As such, you may have never heard of Exit List Index SRM before reading this page, but it's still included for completeness, as well as historical context.