What's the storage type of the game (official cd, burned cd or cd image) ?
CD Image
If applicable, what's the format of your cd image ? (cue/bin, ccd/img, iso, chd, ...)
.cue/.bin
Are you using any setting different from default ? If so, precise
Output to original resolution is on, no other setting has been changed.
If applicable, provide error messages, logs, screenshots, or whatever additional information that could help debugging this
Numerous locations throughout the game produce incorrect visuals, seemingly related to background scrolling.
Note the disjointed propeller on the airship.
The lava floor here is supposed to slant downward towards Eggman, but it rises to cover most of the view when he's on the right and doesn't rise at all when he's on the left. The first screenshot is hard to interpret because Sonic is dead and the floor is Z-fighting with the background.
This isn't all of them, another location where similar stuff happens is the collapsing building in Launch Base Zone Act 2, which causes the floor to scroll as well as the building. There are probably others I didn't pick up on as well.
What's the full name of the game (including region) ? Sonic Jam (USA)
What's your frontend ? (standalone, libretro, ...) ? Retroarch 1.17.0
What's your OS ? (windows, linux, OSX, ...) ? Steam OS
What's your hardware ? (CPU, GPU, ...) ? Steam Deck (Original Model)
What's the storage type of the game (official cd, burned cd or cd image) ? CD Image
If applicable, what's the format of your cd image ? (cue/bin, ccd/img, iso, chd, ...) .cue/.bin
Are you using any setting different from default ? If so, precise Output to original resolution is on, no other setting has been changed.
If applicable, provide error messages, logs, screenshots, or whatever additional information that could help debugging this Numerous locations throughout the game produce incorrect visuals, seemingly related to background scrolling.
Note the disjointed propeller on the airship.
This isn't all of them, another location where similar stuff happens is the collapsing building in Launch Base Zone Act 2, which causes the floor to scroll as well as the building. There are probably others I didn't pick up on as well.