Gran Turismo 4 Modding Discussion

TheAdmiester
HUD is engine level as far as I'm aware, so not possible.
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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?
 
NedimPasha
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...
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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.
Ura1223
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?
Click to expand...
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.
 
TheAdmiester
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
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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.
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You're doing gods work!

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

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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.
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Looks like it was already fixed by either NTSC or Online:
1713804152739.png
 
wolop953
Hatersbby has been making some cool progress as well :)

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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.
 
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Dave A
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.
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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:
1715024970180.png

1715024984120.png


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.
 
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TheAdmiester
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.
Click to expand...
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
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.
Click to expand...
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
 
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