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on the title screen there is green glitchy lines and during game play there are glitchy red lines in the completed bar in the top screen
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3D renderer accuracy issue, I guess. interesting
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ok, quick testing shows that both DeSmuME and NO$GBA also have this bug
guess this is going to be interesting
unless it also occurs on hardware?
confirmed to not occur on hardware
so, sit down and fasten your belt, this is going to be a fun ride
first of all we can take down the 3D label as that has nothing to do with it
the titlescreen logo is made with sprites; it seems to be doing something weird like changing them midframe
we're probably in for a timing issue, or unknown hardware behavior
(tbh this kind of game is the last place where I'd expect to see clever tricks like that)
well yeah it's updating the OAM midframe. welp
trying to figure out why that's shitting itself, tho
for example: it updates OAM right before scanline 30 (during the hblank period of scanline 29), but the changes aren't supposed to apply till scanline 31
I think it's because the hardware renders sprites one scanline in advance or something like that, but I need to do hardware tests
GPU2D: hardware renders sprites one scanline in advance.
fixes Arisotura#375 (midframe OAM update)
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