07440: outrun: The flashing sprites simulating the tires movement maybe are not correctly emulated

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07440	Graphics	Minor	Always	Oct 1, 2019, 01:11	Oct 29, 2019, 20:27

Tester	StHiryu	View Status	Public	Platform	MAME (Unofficial Binary)
Assigned To		Resolution	Bugs That Aren't Bugs	OS	Windows Vista/7/8 (64-bit)
Status [?]	Resolved			Driver	sega/segaorun.cpp
Version	0.214	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07440: outrun: The flashing sprites simulating the tires movement maybe are not correctly emulated
Description	Taking a closer look to some pcb videos on youtube and comparing then with mame, looks like those sprites stop flashing in the emulator when the car reaches high speeds, or are less noticeable. Can't determine if this is caused by a CRT effect or not, but this game still has some missing graphic like those reported at 05877, maybe the same thing happens with the tires. The motorbike at Hang-On has a similar effect, but it seems to be correctly emulated.
Steps To Reproduce	Put your Ferrari at the maximun speed and don't turn the car if it's possible.
Additional Information	Videos from an Outrun PCB and from mame (The effect is most noticeable playing in the emu rather than in the video) -Arcade: -Mame1: -Mame2:
Github Commit

Flags
Regression Version
Affected Sets / Systems	outrun

Attached Files

No.17003 MetalGod Senior Tester Oct 1, 2019, 01:58	What about OUTRUN being played on a CRT monitor using groovymame?
No.17006 StHiryu Tester Oct 1, 2019, 09:48 edited on: Oct 1, 2019, 09:51	Seems the same to me, pay attention when you change to the higher gear at the beginning ,looks like it's the moment the tires stop flashing. Testing in mame, it happens when you reach about 170km/h without changing gears.
No.17025 MetalGod Senior Tester Oct 4, 2019, 19:44 edited on: Oct 4, 2019, 19:44	It looks exactly as MAME in this recording, playing from a pcb but using a non-CRT monitor: Definitely a BTANB in my opinion
No.17026 StHiryu Tester Oct 4, 2019, 20:05 edited on: Oct 4, 2019, 20:07	Yes, but that video was recorded in 50 fps, so I didn't use it as a evidence (You can see no flashing sprites in tires even at low speeds). Maybe someone owns an outrun pcb and could confirm this sooner or later.
No.17139 StHiryu Tester Oct 29, 2019, 15:53	Looking this deeply I'm pretty sure it's not a bug. Setting the brightness and contrast levels on my monitor to the maximum, the sprites now become visible like in the first video. Since I always set those values to the minimum levels, that's why those sprites are barely visible. The differences between those videos from youtube surely relies on different values for brightness and contrast. The best stages for testing this are the Desert (3) and Wilderness (4). For me this report can be closed.