GTR2 AI

Dialing In AI Difficulty For Starting From The Rear

• Session Setup:
  • AI: 100%
  • Rainfall 0%
    • Once dialed in, then you can enable Rainfall or Real Weather
  • Watch laptimes at least 15min
• Tuning AI Practice For Racing From Last Place
  • Practice Setup: Minimal fuel, medium tyres
  • You will be watching Practice laptimes for tuning this
  • If AI are not fast enough even at 120, or not slow enough even at 80, then you'll have to adjust Worst/Mid/BestAdjust in Location AIW files
    • Note: If you tune *Adjust significantly, you will need to adjust QualRatio and RaceRatio
      • QualRatio/RaceRatio=1.0 might be enough if Practice is tuned well enough
    • Tune from AI100
    • Start adjusting by 0.1. Eg. WorstAdjust=0.8 -> 0.9, MidAdjust=1.0 -> 1.1, BestAdjust=1.2 -> 1.3
    • Target: Your best time should be matched by AI in 10-12th position
      • Logic: This is somewhat personal. I find I can get to within 2sec of aliens. So having AI faster than me is realistic. Still, I can slow them down by going down to AI80 or speed them up by going to AI120.
  • For top 10 competitiveness, adjust AI Difficulty until your best laptime falls around the top 10 AI best lap times
    • Ideally, your best laptime should fall within the range of positions 10-12's best laptimes
    • You will be competing for the top 5-10 but probably not the top 5
    • If you want to compete for top 5 or top 3 then aim for your best laptime to fall closer to the front positions' best laptimes

Tuning AI Parameters That Influence AI Performance

• Notes:
  • This is not about finding the right AI Difficulty for, it's about dialing in AI parameters influencing AI performance
    • That's why Qualifying is done with 0% Rainfall
    • Once dialed in, then you can enable Rainfall or Real Weather
  • AI definitely perform differently if you qualify vs not and if you race with them vs quitting out and watching the timing screen
    • To get the most accurate AI performance, you have to be racing live with them
    • One exception: Start a session, put in a few good laps, then quit to Timing screen and they should race up to roughly your performance, and perhaps a bit above it
• Session Setup:
  • AI: 100%
  • Rainfall 0%
  • Watch laptimes at least 15min
• Tuning AI Qualifying
  • Caution: Tuning AI Qualifying performance is only necessary if you can't adjust AI Difficulty enough to get a satisfactory grid position (ie. you're too slow at AI 80 or you're too fast at AI 120)
  • Reminder: Do NOT skip Qualifying to the end. Use Time Acceleration instead.
  • Qualifying setup: Minimal fuel, soft tyres
  • You will be watching Qualifying laptimes for tuning this
  • Tune up/down Location AIW QualRatio until your Qualifying laptime falls in the middle of AI Qualifying laptimes (at AI 100%)
  • You should use a Qualifying setup ie. minimal fuel and soft tyres
• Tuning AI Race
  • Reminder: Do NOT skip Qualifying to the end. Use Time Acceleration instead.
  • Race setup: Laps-appropriate fuel, medium tyres
  • You will be watching Race laptimes for tuning this
  • To watch Race laptimes, start the race then quit to the garage and go to the Timing screen
  • Tune up/down Location AIW RaceRatio until your Qualifying laptime roughly matches the AI laptime for your Qualifying position

How To Place Yourself On The Grid For Different Experience Scenarios

Notes:
- This was an experiment to see if a simple heuristic for gridding myself in certain places, at certain AI Difficulty levels, could improve my racing experience versus my neighbour AIs

Quartiles
Ex. 20 AI Grid
- Blind:		Unfamiliar Track + No Practice:				4th Qrtl (Ex. 20th) at AI 100
- Cold:			Familiar Track + No Practice:				3rd Qrtl (Ex. 15th) at AI 105
- Competent:	Familiar Track + Moderate:					2nd Qrtl (Ex. 10th) at AI 110
- Ready:		Familiar Track + High Practice:				1st Qrtl (Ex. 5th) at AI 115

Quintiles
Ex. 20 AI Grid
- Blind:		Unfamiliar Track + No Practice:				5th Qntl (Ex. 20th) at AI 104
- Cold:			Familiar Track + No Practice:				4rd Qntl (Ex. 16th) at AI 108
- Warm:			Familiar Track + Low Practice:				3nd Qntl (Ex. 12th) at AI 112
- Competent:	Familiar Track + Moderate:					2nd Qntl (Ex. 8th) at AI 116
- Ready: 		Familiar Track + High Practice:				1st Qntl (Ex. 4th) at AI 120

Notes:
- Qrtl = Quartile
- Qntl = Quintile
- Assumes Familiar Car
- Every grid can be split up into quartiles/quintiles to fit this
  - Eg. 30 Grid: 1st Qrtl = 30/4 = 7.5 = P8
  - Eg. 20 Grid: 1st Qntl = 20/5 = 4 = P4

Tweaking Rules:
- Goal:
  - Gain 4-8 spots OK but any more and should grid -5 (closer to front for more challenge)
  - Lose 4-8 spots then grid +5 (closer to rear for less challenge)

Guidelines:
- Take it easy on the first corner and first lap, don't pass too many by abusing the bunched up AI

Tests:
- 240713 GT's 2004, Imola GP 2004 (Cold), Chrysler Viper GTS-R (Unfamiliar): Ahead raced away, behind stayed close
- 240713 GT's 2004, Valencia GP 2004 (Cold), Chrysler Viper GTS-R (Unfamiliar): Ahead raced away, behind stayed close
- 240713 GT's 2004, Donington GP 2004 (Competent), Chrysler Viper GTS-R (Unfamiliar): Ahead raced away, behind stayed close
- 240713 GT's 2004, Donington GP 2004 (Race Ready), Lam Mur R-GT 2004 (Familiar), Grid 30, AI 115: 8th to 6th, ahead stayed within reach, behind stayed close
- 240713 GT's 2004, Zuhai GP 2004 (Cold), Lam Mur R-GT 2004 (Familiar), Grid 42, AI 105: 32nd to 21st +11, ahead stayed within reach, behind stayed within reach
- 240713 GT's 2004, Zuhai GP 2004 (Competent), Lam Mur R-GT 2004 (Familiar), Grid 42, AI 110: 21st to 13th +8, ahead stayed within reach, behind stayed close
- 240713 GT's 2004, Oschersleben GP 2004 (Cold), Lam Mur R-GT 2004 (Familiar), Grid 32, AI 110: 26th to 19th +7, ahead stayed within reach, behind stayed within reach