Graphic Bug - Weird lines on car reflections

1101trash · Feb 17, 2023

Hi, recently I've expirementing this issue with the reflections on the cars:
It's very annoying an you can appreciate it easily. I've been having some weird blur at the front of the car but I managed to fix it. But nothing works to fix this.
I've tried:
Clean reinstall of drivers
Clean reinstall of Assetto Corsa (deleting game folder and documents folder)
Clean reinstall of CM (deleting appdata folder)
Clean reinstall of Custom Shaders Patch
Tried activating extra fx, graphic adjustments and video settings. Not a problem of any of these FX and also not a problem of the PP filter and neither Weather FX script. Also not a problem of the AA, no special settings on Nivida Panel and not a problem of GSync. Also not a problem of ambient occlusion (HBAO). I've tried so many combinations of settings, but nothing works. It's not just the car, the entire car pack have this issue (at least what I tried, and cars not from the pack) but before it wasn't happening. I didn't touched anything, it started happened when I was messing around with SSLR settings on Content Manager, and nothing worked again, even resetting configuration. My hardware is a 4 year old GTX 1060 6GB. Maybe it's time to change.

Stereo · Feb 18, 2023

Assuming you do mean the dark stripes on the trunk/roof, those are caused by shadows on thin 2-sided objects. People modeling cars can mitigate it in a few ways (like don't model the inside of the trunk lid... make sure the headliner is fairly thick. there is also a shadow bias shader setting) and for end users increasing shadowmap quality or changing time of day can also help. Usually it gets worse the less direct the sunlight is, so noon should have least effect on a roof. CSP has some shadow tweaks settings that don't really improve it but can make it less flickery.

Just on general terms this is a problem with the way AC renders shadows and almost everyone experiences it, there's sometimes no mitigation.

1101trash · Feb 19, 2023

Stereo said:
Assuming you do mean the dark stripes on the trunk/roof, those are caused by shadows on thin 2-sided objects. People modeling cars can mitigate it in a few ways (like don't model the inside of the trunk lid... make sure the headliner is fairly thick. there is also a shadow bias shader setting) and for end users increasing shadowmap quality or changing time of day can also help. Usually it gets worse the less direct the sunlight is, so noon should have least effect on a roof. CSP has some shadow tweaks settings that don't really improve it but can make it less flickery.

Just on general terms this is a problem with the way AC renders shadows and almost everyone experiences it, there's sometimes no mitigation.

Thanks you so much! I appreciate your answer. So could I change those of the shadow bias and the headliner in the car model or shadowmap quality? Could you tell me how to do it, if you don't mind? I think I'll try some to see which one works better. I will research about it, thanks you. I'll be replying later

Stereo · Feb 19, 2023

Shadow bias setting is this, 0 is default distance, 1 adds that distance again, you can use decimals though (eg. 0.5 or 1.5 extra)

Tradeoff is the higher it gets, the farther behind it objects have to be to receive shadows. Default puts it as close as possible but doesn't work well when it's too thin.

Shadowmap quality is this.

it's a tradeoff, higher resolution makes distant shadows flicker more because AF doesn't work well, lower gives you those stripes.