Gran Turismo 4 Modding Discussion

[Ura1223]

HUD is engine level as far as I'm aware, so not possible.

Hello, I have 2 questions: what programs are needed to decrypt IRX files? I don’t understand development at all, I just want to look at these files, and will the mod work on the original PS2 if I patch the image and write it to a USB flash drive?

 

[TheAdmiester]

I started a playthrough of the randomizer and it's only gotten me more excited for this mod!

Question, not necessarily a request, is it possible to shorten the license tests/remove tests in order to open up more event slots?
I don't know if the license tests are treated differently from regular events or if editing the UI to display <16 tests would work at all. Just a thought...

It is possible since licences are just events with a different type to the rest, but it would be a lot of work to do the things you say, and I don't think I'll really run into a limit before needing to remove licences, so probably not something I'll be doing.

Hello, I have 2 questions: what programs are needed to decrypt IRX files? I don’t understand development at all, I just want to look at these files, and will the mod work on the original PS2 if I patch the image and write it to a USB flash drive?

I think IRX files are essentially drivers or libraries, kind of like the PS2 equivalent of a DLL file. They aren't necessarily files you can extract per se, but rather compiled code.

 

[Ura1223]

I think IRX files are essentially drivers or libraries, kind of like the PS2 equivalent of a DLL file. They aren't necessarily files you can extract per se, but rather compiled code

Thank you, I thought this folder system was encrypted under the name IRX and this is the code😅

 

[TheAdmiester]

New slightly longer-form vid showing how the new missions are integrated as if they were always there, and some footage of the added driving cameras.


The graphics for the mission menu were quite a lot of work but it's nice to see them looking so consistent with the originals.

 

[tomo 427 S/C]

New slightly longer-form vid showing how the new missions are integrated as if they were always there, and some footage of the added driving cameras.


The graphics for the mission menu were quite a lot of work but it's nice to see them looking so consistent with the originals.

You're doing gods work!

Cannot wait to see the next release. Going to be so worth it.

 

[Ura1223]

You are a great fellow for continuing this, the question is, can you leave the option to move the camera? I noticed that not all cars are suitable for a close view from the cockpit

 

[tomo 427 S/C]

Oh something I just thought of too... Will saves from the current Spec II release be compatible with the next one or am I gonna have to start all over again?

 

[Ura1223]

Oh something I just thought of too... Will saves from the current Spec II release be compatible with the next one or am I gonna have to start all over again?

I think they can work just REMEMBER to make a backup

 

[GTP_reddevil]

I have a suggestion (more like a quick fix):

I have noticed on the PAL version that National A coffee break challenge says in the information that the training car is an Opel Speedster Turbo - yet the actual car used is a Peugeot 206cc.

I don’t know if this issue occurs in other versions but I only just very recently came across it so I appreciate if it’s already well-known - I’ve just never noticed until now.

This may not be fixable but thought I’d mention it as my OCD finds it annoying.

 

[TheAdmiester]

I have a suggestion (more like a quick fix):

I have noticed on the PAL version that National A coffee break challenge says in the information that the training car is an Opel Speedster Turbo - yet the actual car used is a Peugeot 206cc.

I don’t know if this issue occurs in other versions but I only just very recently came across it so I appreciate if it’s already well-known - I’ve just never noticed until now.

This may not be fixable but thought I’d mention it as my OCD finds it annoying.

Looks like it was already fixed by either NTSC or Online:

 

[wolop953]

Hatersbby has been making some cool progress as well

 

[tomo 427 S/C]

Hatersbby has been making some cool progress as well

This looks fantastic, but I think the close ups of the cars are just a bit too zoomed in, and the used car icons look squashed.

Very cool ideas though!

 

[Dave A]

Hatersbby has been making some cool progress as well

Some cool tweaks there, but one point I would strongly recommend the author against, is making prize cars winnable once. Money farming in a single player game isn't that big a problem, and you can get around it unbalancing the game with a few different methods such as changing which cars are won where, so the expensive cars are prizes in higher license and longer events only etc. But having cars you can only win once that you can't obtain anywhere else would be a huge blow for a GT4 mod IMO.

 

[TheAdmiester]

Some cool tweaks there, but one point I would strongly recommend the author against, is making prize cars winnable once. Money farming in a single player game isn't that big a problem, and you can get around it unbalancing the game with a few different methods such as changing which cars are won where, so the expensive cars are prizes in higher license and longer events only etc. But having cars you can only win once that you can't obtain anywhere else would be a huge blow for a GT4 mod IMO.

Yeah, if I'm being brutally honest a lot of things in that video seem to be change for the sake of change, without much UI or game design consideration behind them. I'm not sure if I've mentioned it before but my solution is a pretty simple/obvious one: once you've won a prize car that's listed in the new/legend dealer with a -- price, it becomes buyable.

Not sure I quite understand all their changes regarding mileage and prices either, since GT4 already calculates those unique for each car?

Anyway, came here to post a new update - owned cars are now highlighted as such in GT mode:

On the surface it might look like a very simple change, but actually implementing it properly is quite a challenge.

Consider that you have to:

1. Run through the entire garage to check if a car exists within (which can be up to 1,000 cars)
2. Repeat step 1 for every single car that appears on a given screen, toggling the check icon if it exists in the garage
3. Do all of this on hardware from 1999

And you can probably understand why GT4 didn't already do this. However, thanks to some guidance from ddm and pez2k, we now have a fairly brilliant system using GT4's existing unused binary search functionality that has no noticeable slowdowns - even with every car in your garage and visiting a big dealer like Nissan - and updates on the fly as soon as you buy or win a car.

 

[tomo 427 S/C]

Yeah, if I'm being brutally honest a lot of things in that video seem to be change for the sake of change, without much UI or game design consideration behind them. I'm not sure if I've mentioned it before but my solution is a pretty simple/obvious one: once you've won a prize car that's listed in the new/legend dealer with a -- price, it becomes buyable.

Not sure I quite understand all their changes regarding mileage and prices either, since GT4 already calculates those unique for each car?

Anyway, came here to post a new update - owned cars are now highlighted as such in GT mode:
View attachment 1353408
View attachment 1353409

On the surface it might look like a very simple change, but actually implementing it properly is quite a challenge.

Consider that you have to:

1. Run through the entire garage to check if a car exists within (which can be up to 1,000 cars)
2. Repeat step 1 for every single car that appears on a given screen, toggling the check icon if it exists in the garage
3. Do all of this on hardware from 1999

And you can probably understand why GT4 didn't already do this. However, thanks to some guidance from ddm and pez2k, we now have a fairly brilliant system using GT4's existing unused binary search functionality that has no noticeable slowdowns - even with every car in your garage and visiting a big dealer like Nissan - and updates on the fly as soon as you buy or win a car.

Does it work the same way as GTPSP where it works by colour too (annoyingly) or are we lucky enough for colour not to matter?

 

[TheAdmiester]

Does it work the same way as GTPSP where it works by colour too (annoyingly) or are we lucky enough for colour not to matter?

Colour doesn’t matter, I think that would be too naggy for the user and not feasible in terms of scripting.

 

[tomo 427 S/C]

Colour doesn’t matter, I think that would be too naggy for the user and not feasible in terms of scripting.

Thank god

 

[Labonski]

Yeah, if I'm being brutally honest a lot of things in that video seem to be change for the sake of change, without much UI or game design consideration behind them. I'm not sure if I've mentioned it before but my solution is a pretty simple/obvious one: once you've won a prize car that's listed in the new/legend dealer with a -- price, it becomes buyable.

Not sure I quite understand all their changes regarding mileage and prices either, since GT4 already calculates those unique for each car?

Anyway, came here to post a new update - owned cars are now highlighted as such in GT mode:
View attachment 1353408
View attachment 1353409

On the surface it might look like a very simple change, but actually implementing it properly is quite a challenge.

Consider that you have to:

1. Run through the entire garage to check if a car exists within (which can be up to 1,000 cars)
2. Repeat step 1 for every single car that appears on a given screen, toggling the check icon if it exists in the garage
3. Do all of this on hardware from 1999

And you can probably understand why GT4 didn't already do this. However, thanks to some guidance from ddm and pez2k, we now have a fairly brilliant system using GT4's existing unused binary search functionality that has no noticeable slowdowns - even with every car in your garage and visiting a big dealer like Nissan - and updates on the fly as soon as you buy or win a car.

I love trying to collect all the cars I can in driving/racing games, so even a change as minor on the surface as this actually just makes that experience ever more satisfying as well as being a great QOL feature. Not needing to make some ****ing spreadsheet just to be able to conceive where you're at in your progression towards collection them all right? XD Great stuff

 

[TheAdmiester]

I think I've posted about the new Quick Menu before - just finished making it even more useful by adding a submenu for event halls.

 

[mechkbfan]

Is there somewhere with a summary of active GT4 mods?

I've seen stuff like graphics overhaul, Re-Tuned, Spec II but just wondering what others are around

Edit: I'll be happy to make a pull request here if someone knows them off top of head

Index - Gran Turismo Modding Hub

Gran Turismo Modding Hub - The central source of information for GT Modding.

nenkai.github.io

 

[Dave A]

Is there somewhere with a summary of active GT4 mods?

I've seen stuff like graphics overhaul, Re-Tuned, Spec II but just wondering what others are around

Edit: I'll be happy to make a pull request here if someone knows them off top of head

Index - Gran Turismo Modding Hub

Gran Turismo Modding Hub - The central source of information for GT Modding.

nenkai.github.io

The GT Modding Community Discord server is probably where you'll find most mods currently available, or actively being worked on mentioned in one place.

 

[TheAdmiester]

The GT Modding Community Discord server is probably where you'll find most mods currently available, or actively being worked on mentioned in one place.

I'm not sure if that server even discusses GT modding anymore after a few weird events - you certainly won't see updates on Spec II in there unfortunately.

I do now have my own server that I use for general respectful racing game chat + updates on most of my mod projects, I dunno what the GTP rules are on posting Discord links but if people are interested I can post the invite here.

 

[tomo 427 S/C]

I'm not sure if that server even discusses GT modding anymore after a few weird events - you certainly won't see updates on Spec II in there unfortunately.

I do now have my own server that I use for general respectful racing game chat + updates on most of my mod projects, I dunno what the GTP rules are on posting Discord links but if people are interested I can post the invite here.

If possible, yes please!

Got a steam deck arriving in the post, so I'm hoping to start a new GT4 playthrough on it. Honestly might wait to start until the next Spec II update comes

 

[TheAdmiester]

If possible, yes please!

Got a steam deck arriving in the post, so I'm hoping to start a new GT4 playthrough on it. Honestly might wait to start until the next Spec II update comes

May as well then, anyone else is also more than welcome to join: http://discord.gg/WNqSqGGDQ8

 

[Dave A]

I'm not sure if that server even discusses GT modding anymore after a few weird events - you certainly won't see updates on Spec II in there unfortunately.

I do now have my own server that I use for general respectful racing game chat + updates on most of my mod projects, I dunno what the GTP rules are on posting Discord links but if people are interested I can post the invite here.

It's not what it used to be, but there are a couple of modders keeping up with thier mod news on there. Mainly GT2 A-Spec, which has it's own server and GT6 Strato mod. But I prefer to go direct to specific mods servers that I'm following, so it's great you now have your own.

 

[rikiflsh_99]

Just a random tought, but is it possible to change the unlocking criteria for circuits in arcade mode, like doing a certain amount of events, by winning specific races or race there for the first time instead of simply letting days pass? As for the cars, have you considered if possible to start arcade mode with less cars from the beginning, say, around 150 instead of 250?

Also, not sure if you already fixed it but the Nissan Sileighty doesn't show up under the Nissan manufacturer in arcade mode (and GT Mode iirc) as is only found when cars are sorted by era.

 

[TheAdmiester]

Just a random tought, but is it possible to change the unlocking criteria for circuits in arcade mode, like doing a certain amount of events, by winning specific races or race there for the first time instead of simply letting days pass? As for the cars, have you considered if possible to start arcade mode with less cars from the beginning, say, around 150 instead of 250?

Also, not sure if you already fixed it but the Nissan Sileighty doesn't show up under the Nissan manufacturer in arcade mode (and GT Mode iirc) as is only found when cars are sorted by era.

Arcade has everything unlocked by default in Spec II, my idea is that a good arcade mode should be like "try anything, but don't earn anything". I won't rule out the possibility of making it more like a challenge mode in the future, but for now I prefer it this way.

In other news I've tackled another big feature that was fairly highly requested:


Colours are essentially baked into each car in GT4 so there's no way of respraying them in new colours like GT5 and onwards, but I think this is still a pretty big win.

 

[EndymionFRS]

Arcade has everything unlocked by default in Spec II, my idea is that a good arcade mode should be like "try anything, but don't earn anything". I won't rule out the possibility of making it more like a challenge mode in the future, but for now I prefer it this way.

In other news I've tackled another big feature that was fairly highly requested:


Colours are essentially baked into each car in GT4 so there's no way of respraying them in new colours like GT5 and onwards, but I think this is still a pretty big win.

That’s still pretty huge! I can’t wait!

 

[TheAdmiester]

 

[deththrasher]

Is there any way to get a GT3 style analog rev counter? Maybe it's been asked a million times but hey