Twinkle Park - Sonic Adventure Autodemo

Twinkle Park in the Sonic Adventure Autodemo.

It doesn't load normally because its pointers to 1ST_READ are for an older version of the file. It took me a decade but I finally figured out how to fix it. In all, this stage had ~130 unique broken pointers, most appearing more than once. The stage didn't load its textures but they were on the disc, so I fixed that myself by making them load the same way as Speed Highway's.

It's in an early state. Act 1 had just received a redesign (but the object layout from the old version is still present) and Act 2 only has a basic layout for half of the stage. Act 1's layout is for an older object list - with default AD files it crashes trying to load the object ID 0x3D, which doesn't exist in the Autodemo. Very few of the final Act 1's objects are present in the object list and all of them are unused here.
Both Landtables have rough patches, Act 1 has an issue with the ceiling at the start being stretched (but not its collision) and a gap near the loops. Both of them also have visible untextured areas.

The lighting and texture files for the background and the coaster sparkles aren't on the disc. The majority of sounds in the stage are absent - the objects don't call any of the audio functions - even the code that handles the BGM is missing. The skybox does exist but it doesn't appear in this video due to a pointer being fixed incorrectly that I didn't notice until Sky Deck.

One of the biggest differences in this stage is the swinging pirate ship object, which has an entirely different model and runs different code to the final version's.

Unlike the final game, the loading zone for Act 3 accepts all characters. The exit transition for that area is placed further back than the final game - inside the hallway behind where the door is, which you don't see in the final.

This version of Twinkle Park lines up with a brief section of footage in an old Dreamcast promotional disc, which can be found here (at 1:08):
   • Sega Dreamcast Promotional Disc 1998-10-22...  

Download as a mod via X-Hax's GitHub:
https://github.com/X-Hax/dreamcast-mods
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