THUG2 CAS Flash Glitch Discussion

[BlazE]

You must not know who I am...


https://youtu.be/qKqyHLNzCW0

Not quite the same but very similar

"You must not know who I am..." lol

Too bad that's probably just done in lighting tools with debug and people online wouldn't even see it.

[BloodshotBiz]

Again you must not know who I am. This is done via glitch kid


Edit: mhmmm
https://youtu.be/Ij7lvgyLkF4

[BlazE]

Again you must not know who I am. This is done via glitch kid


Edit: mhmmm
https://youtu.be/Ij7lvgyLkF4

Lol get over yourself "kid" don't get mad because someone doubted the amazing leet haxor skills of biz.

[BloodshotBiz]

glitchmaster. no "leet haxor" here. get over yourself, DOH

[BlazE]

glitchmaster. no "leet haxor" here. get over yourself, DOH

 

[GokuStrikeBack (Goku.FTR)]

In Early Versions Of Thug Pro wich includes THEMOD 1.3 In THEMOD the saturation and value are infinite by itself and saving on THEMOD and opening thug pro should work

[Challenger]

Old Phun forum thread for reference:
https://www.tapatalk.com/groups/phun/anyone-remember-the-cas-flash-glitch-t6032.html

Wayback Machine snapshot in case Phun goes away:
http://web.archive.org/web/20191008180052/https://www.tapatalk.com/groups/phun/anyone-remember-the-cas-flash-glitch-t6032.html

I’m trying to get this to work with other games. Doing some research on THUG, it was the third RenderWare based game in the series, with THUG2 using a different render engine. Comparing the save file formats, I don’t see the color variables used in THUG. However, I’m checking in to THAW which appears to be a similar file layout to THUG2. Once I can isolate the addresses for the saturation and value adjustments I’ll try injecting 0x65 and 0x56 to see if I can replicate the effect in the PS2 version.



Regarding the underlying cause, reaching out to the PCSX2 community on this one.
https://forums.pcsx2.net/Thread-Curious-About-Crazy-Graphics-Bug-on-Original-PS2

Stay tuned!

[Challenger]

I modified a THAW CAS and loaded it in the game. Unfortunately Neversoft has clamped the values to a maximum of 0x5A and 0x4B. I verified this by changing the values, updating the checksum, importing the save file, loading THAW, saving the file in THAW, and re-exporting it again to view in a hex editor. So in short, Neversoft took note of this in THUG2 and didn't want a bunch of flashy messes when people were playing online in THAW.

That doesn't mean the effect itself isn't achievable, if someone would be so kind as to write an infinite colors Gameshark code for THAW I would be able to say for sure if it's possible at all or not. For reference, here is the code for THUG2. It unlocks the saturation and value adjustments.

Inf Sat
207C2D88 00000000
207C2D74 00000000

Inf Val
207C2D88 00000000
207C2D9C 00000000

Someone look into this code please. If we find this effect is possible in THAW that would be pretty amazing.

[Challenger]

Pretty sure nobody is reading this thread at this point, but a very interesting development I made tonight:

I modified a THAW CAS and loaded it in the game. Unfortunately Neversoft has clamped the values to a maximum of 0x5A and 0x4B. I verified this by changing the values, updating the checksum, importing the save file, loading THAW, saving the file in THAW, and re-exporting it again to view in a hex editor. So in short, Neversoft took note of this in THUG2 and didn't want a bunch of flashy messes when people were playing online in THAW.

I saw PCSX2 got some major updates recently, and decided I would pick up this "cold case" and blow off the dust. What I concluded nearly 6 years ago is incorrect. The false premise that lead me to this conclusion is Neversoft clamped the maximum saturation and value variables for the colors when saving and loading a skater file in THAW. While the values are limited upon loading a file if I inject hex values 0x65 and 0x56 for saturation and value for any skater clothing or accessory, that is not the reason why my initial test in THAW didn't work. I'm actually not sure why the flash glitch didn't work in THAW. Logically then, by extension Neversoft either didn't know about the glitch, knew about it and didn't patch it out, or simply couldn't due to time constraints before release. It's also likely they were aware of it but couldn't find the underlying cause.

That doesn't mean the effect itself isn't achievable, if someone would be so kind as to write an infinite colors Gameshark code for THAW I would be able to say for sure if it's possible at all or not.

This was right under my nose and I just didn't find the correct thread. A bunch of Gameshark codes for THAW were actually here, including the crucial CAS infinite saturation and value codes:

http://www.thps-mods.com/forum/viewtopic.php?t=2936

Of course, that site is down now. By some miracle, Brave Search still showed that thread in a search result. It's frustrating how difficult it is to preserve this kind of information in 2025. Anyway, someone was kind enough to archive this thread in the Wayback Machine. One single copy from 2022:

https://web.archive.org/web/20220924080012/http://www.thps-mods.com/forum/viewtopic.php?t=2936

The THAW codes for what I was looking for:

Inf. Saturation Scales:
20D0CD54 00000000
20D0CD68 00000000

Inf. Value Scales:
20D0CD7C 00000000
20D0CD90 00000000

If we find this effect is possible in THAW that would be pretty amazing.

Ladies and gentlemen, it is possible. CAS flash works in THAW, and the glitch is persistent across CAS save files. More to come in a new thread with lots of screenshots:

https://thpsx.com/forums/index.php?topic=1752.msg9247