Is it possible to disable anti-aliasing in N64 games via GameShark cheats?

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posted by mdmx on Feb 7, 2016:

Thanks, I think I've got it.

In this case I could also use two 8bit codes for the GameShark:

800EF37D 0000 (turn Filter in Turok off)
800EF37E 0032 (turn Anti-Aliasing in Turok off)

edit: For some reason the second code doesn't work properly without the first code.
 

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posted by Fandangos on Feb 7, 2016:

It worked here using atl64 (alternative menu for the everdrive 64) using YALM cheat codes.




Spoiler: BIG IMAGE
Before:


After:



 

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posted by mdmx on Feb 7, 2016:

@ Fandangos: Thanks for your photos.

I've got the codes for another game: Star Wars Shadows Of The Empire (PAL):

default:






changed 0x800E910D to 00
AND 0x800E910E to 32






changed 0x800E910D to 00
AND 0x800E10E to 33






GameShark code: 880E910D 0000 (disable Filter, push GS button to activate)
GameShark code: 880E910E 0033 (disable Anti-Aliasing, push GS button to activate)

For some strange reason these GameShark codes did only work with the GS button method for me
 

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posted by rso on Feb 7, 2016:

SotE looks like it's losing some of its colors - I hope that's just a camera issue (probably is). Other than that, awesome idea/thread/progress!
 

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posted by mdmx on Feb 7, 2016:

Don't worry, SotE does not loose colors. This is because I'm using a CRT and it's difficult to make good photos.

The main problem with SotE is the horrible dithering. Without the filters it's clearly visible. Does anyone know how to disable the dither?
 

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posted by bagheera on Feb 7, 2016:

Damn, that makes quite a big difference. Looking forward to playing with this myself.
 

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posted by xdaniel on Feb 7, 2016:

mdmx: We're disabling the filter that removes the dither by changing that 1 to 0, see DITHER_FILTER_EN in the file I linked to before. I'm guessing that, considering the description for the dither filter there, we would need to have a 32-bit color depth instead of just 16-bit to get rid of it. I have not tried changing that setting yet, so I have no idea if we can just force a game to use a different color depth than what it's meant to be using...

Edit, nope, can't just force it this way:


 

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posted by AtomizerZero on Feb 7, 2016:

This is some interesting stuff! If this becomes easy enough to work out and enable for many or all games, you should totally set up a database for it of some kind. That'd be pretty awesome.
 

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posted by BLUamnEsiac on Feb 7, 2016:

I don't know why anyone would want to do this but I find it fascinating all the same, much like those Dreamcast widescreen hacks. Thanks for your hard work!
 

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posted by Fandangos on Feb 7, 2016:

BLUamnEsiac said:






I don't know why anyone would want to do this but I find it fascinating all the same, much like those Dreamcast widescreen hacks. Thanks for your hard work!

Just like the DC Widescreen, exactly my thoughts!

This looks beautiful with the xrgb mini, without the mods, n64 looks like composite on hdmi.

If it's possible to get 32bit and remove dithering, this is going to give a new breath to n64 poor graphics and get closer to emulation without the bugs.