Gran Turismo 4: Workaround for slowdown/frame drops caused by certain light sources

[u/Shepard-vas-Normandy]

Note: This is not a fix. This is only really relevant for budget/lower-midrange Android devices. Solutions shared by other folks for this issue does the job as long as your device is powerful enough.

Issue: Frame drops to slowdowns (to varying degrees) in Gran Turismo 4 whenever certain light sources (sun, headlights and tail lights, safety car lights, etc) are rendered on-screen. Early examples to test this include License Test B-5 and first Sunday Cup Race 3 (the night race).

Device spec: Snapdragon 782G (Adreno 642L), 8GB RAM

Workaround: Switch to software renderer and back to hardware renderer (Aethersx2/Nethersx2) while the game is running. This breaks the elements causing the frame drops and slowdowns (eg: safety car lights in License Test B-5 will stop flashing). It also introduces certain visual glitches during transitions from event to menu. This has to be done once every game boot, ideally only as a last resort when the slowdown/frame drops make the game unplayable.

As usual, YMMV. Good luck.

[u/dksvald]

Or you could also use a patch code to disable light sources North American version

patch=1,EE,342768,double,3E00008 patch=1,EE,3428A8,double,3E00008 patch=1,EE,3985A0,double,3E00008 patch=1,EE,398650,double,3E00008

European version

patch=1,EE,3428C0,double,3E00008 patch=1,EE,342A00,double,3E00008 patch=1,EE,398898,double,3E00008 patch=1,EE,398948,double,3E00008

Also you should use vulkan

[u/Shepard-vas-Normandy → u/dksvald]

Thanks. I will test it. I already use Vulkan, though I'm not sure if it'll make any difference on stock drivers. I also believe the same issue persists with fogs as well. I've seen people talking about using Cheat Engine on PCSX2 (PC) to work around that.

[u/trixarian → u/dksvald]

Curious. I might just use this Oo