Emulator Issues #12238
P.N.03 Banding
0%
Description
Game Name?
P.N.03
Game ID? (right click the game in the game list, Properties, Info tab)
GPNP08, GPNE08, GPNJ08
What's the problem? Describe what went wrong.
Since 4.0-1192 title has shown significant odd color banding. Refer: https://wiki.dolphin-emu.org/index.php?title=File:Pn03_banding.png
This may have been reduced in recent builds 5.0-12511 shows:
https://wiki.dolphin-emu.org/index.php?title=File:Pn03_nobandingSep2020.png
Appropriate emulation should look like:
https://wiki.dolphin-emu.org/index.php?title=File:Pn03_no_banding.png
But, I'm unclear if the 5.0-12511 image has "Force 24b Rendering" enabled or not, which if disabled might explain the residual banding.
Needs review to determine if this is still an issue.
What steps will reproduce the problem?
Start game, view initial rooms. (I think)
Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.
Possibly depending on the settings the image for 5.0-12511 was taken with.
Is the issue present in the latest stable version?
Yes
If the issue isn't present in the latest stable version, which is the first broken version? (You can find the first broken version by bisecting. Windows users can use the tool https://forums.dolphin-emu.org/Thread-green-notice-development-thread-unofficial-dolphin-bisection-tool-for-finding-broken-builds and anyone who is building Dolphin on their own can use git bisect.)
4.0-1192
History
#3
Updated by kolano 5 months ago
These videos seem to show minimal banding on hardware...
https://youtu.be/B3ARK18UV78?t=379
https://youtu.be/pN5veQjVbcA?t=306
https://youtu.be/1AN-gt3nCSo?t=206
...I can see minimal banding in some paused spots, but it's unclear if that if that's due to the compression used or not.
#4
Updated by kolano 5 months ago
Moby games shots seem to show banding, but again JPG compressed so source is unclear...
https://www.mobygames.com/game/gamecube/pn03/screenshots/gameShotId,51981/
#12
Updated by kolano 5 months ago
kolano wrote:
Yeah, I hadn't tried the different rendering backends earlier. All but software rendered are the same. Something noticeable in the software rendering is that there seems to be some sort of dithering going on, where every other verticle line is a different color.
kolano wrote:
Yeah, I hadn't tried the different rendering backends earlier. All but software rendered are the same. Something noticeable in the software rendering is that there seems to be some sort of dithering going on, where every other verticle line is a different color, which might make the banding less visable.
#13
Updated by JMC4789 5 months ago
- File pn03console.png pn03console.png added
This is visible on console imo. Got with a component cable and it's very visible.
#14
Updated by kolano 5 months ago
Yeah, I hadn't tried the different rendering backends earlier. All but software rendered are the same. Something noticeable in the software rendering is that there seems to be some sort of dithering going on, where every other verticle line is a different color, which might make the banding less visable.
#16
Updated by JMC4789 5 months ago
You're fine.
I'm leaning toward the banding being correct emulation and older builds being inaccurate though. If you turn on all the accuracy options in Dolphin, it sort of muddies it, but the component signal from my Wii makes it even muddier. It's still there though.
#20
Updated by kolano 5 months ago
The banding does still seem to be there in the console shot, but the dithering makes it significantly less visible. I think the lack of the dithering on the HW backends explains what's going on; unclear if there is any mechanism to emulate such more accurately; we at least seem to get it right on the software backend.
#21
Updated by Techjar 5 months ago
Yeah, the game clearly just wasn't made with high resolutions on mind (duh, the console is only 480p at best). It's just going to look weird at high resolutions, there's not really anything we can do about that. If we blur it enough to mask the crappy lighting like the console does, then we're just back to native resolution anyways. With that said, running at native resolution with the copy filter on might be enough to mask it.
#25
Updated by Bionic.Catbus 5 months ago
It's neat to see people talking about this. My observations:
- Force 24-Bit Color removes the dithering but not the banding. It's a shame this option doesn't fully solve things
- I imagine the dithering, copy filter/deflicker, and composite signal mask most of the banding on original hardware, but it also just seems less intense in general than it does here no matter what settings are used
- This might be the change that ushered in all the banding: https://github.com/dolphin-emu/dolphin/pull/68