if you check this, there are multiple ways to use DOF.
-in FGear you can access post process settings from FMinimalViewInfo struct but never tried it.
-you can also use a spring arm + a camera component and edit camera settings.
-or you can just add a post process volume and setup DOF parameters.
Already have a PostProcess volume but the dof settings there or in the standard camera not works for me or at leaast im unable to get a good settings. The unique way to get the DOF quality/feeling i want is using a Cine Camera. Setting traking the car, lock focus and other params looks nice.
Then the unique solution will be add a spring arm + Cine Cam? i think the coder already tried this but there was a problem to get the coordinates due the OrbitCamera is created on runtime or something like that.
The idea was use the cinecamera and pass the orbitcamera coordinates to still use the lag/tilt⌠options to customize the behaviour.
Is that possible, or you mean use a spring arm + cine camera and create the full camera system from scratch?
we used a spring arm + a camera component in our own game but i have no idea if a cine camera is suitable for this task.
orbit camera is an optional component so if you remove it then youâll have no side effects.
yes the vehicle is still in 1st gear so they continue to spin and wheels have no real collider. they can be avoided but some games may need it and some games not. so itâs up to the user, you can switch to neutral gear(or fully brake) when all wheels loose contact and also do necessary checks to limit steering in a similar case.
Maybe youâre using the wrong functions. Because Chaos ticks in a separate thread, you need to call functions that marshal your forces. In a C++ class derived from UChaosWheeledVehicleMovementComponent, try calling AddForce on the property VehicleSimulationPT. This will queue up the force properly for the physics thread. Hope this works, looking to pick up FGear for UE5!
FGear doesnât use the Unreal Vehicle base.
It isnât using the PhysX base either.
Itâs it own physics calculations.
The problem with Chaos atm, is that it makes heavy use of the physics sleep states. If an object isnât being focused or interacted with, itâll sleep the physics object (this is for performance reasons).
Iâm still running on 4.27 but will look into migrating to 5.0 soon. Will put my findings here if I solve the issue!
Looks like EpicGames has updated the Substepping page for UE5: Physics Sub-Stepping in Unreal Engine | Unreal Engine 5.0 Documentation
UPD: I just now realized that this is just copied text from the UE4 documentation 
I have good news and bad news.
Good : I found a workaround for the freezing problem, itâs ugly but works.
Bad : There seems to be serious problems with chaos collision resolving, sometimes vehicles start flying to the moon with simple collisions.
Ugly : I have no idea how substepping and async physics ticking works right now.
UE 4.27
I want to fix the replication system in your plugin. I need to make sure that the car does not accept its server position, but only sends it to the server so that other clients see changes in the position of the car. I want to do this, because with large lags, the playerâs car moves with a very large delay.
In other words, I need to make sure that the server does not update the position of the playerâs car that drives this vehicle.
Iâm already working on your pluginâs source code, but I need help. What property do I need to edit to make this exception?
i wouldnât call that fixing, what you want to do is called client authoritative model.
make sure your local vehicleâs physics body is simulated and do not call UFGearReplication::updateInterpolation function for this vehicle. This way you have authority over your transform and others will only see your interpolated position. This is a much simpler model but you might see problems with collisions.
I did what you said. The client now moves freely independently of the server, but because of this, the car starts to behave incorrectly for other clients. It drives normally at first, but then flies off in the other direction. Do you have any ideas how this can be fixed?
P.S sorry for my english 
i canât tell you how to do it step by step since i havenât done it myself before. the good news is you donât need to write a lot of code but you need to list your rules and apply it to the current structure. i suggest first you understand how it works and then modify it to let the current player have direct control over its vehicle.
@lazybitgames Hi, do you think that you will made the plugin for UE5 or you will recommend me rather to convert cars to common UE5 system?
In order to do code changes, you have to understand that the physics in UE4/UE4 isnot deterministicâŚ
Deterministic physics simply means that object being pushed (being applied force) will end in the same spot in many many tries. Here, UE4 is using PhysX and it is not deterministic. That is why you see the car doesnât move in the same exact direction across the clients.
Btw, this is not an easy subject to tackle.
if you think epic will fix chaos problems for the next update you can use fgear, otherwise most of the same problems also apply to the unrealâs own vehicle system. iâve already been testing fgear with ue5 and fixed most of the problems with some workarounds but not all of them, so we are also waitingâŚ
Really appreciate your work Yunus, I dread to think the amount of fixes you have had to action and indeed further issues you have/will come across. Fingers crossed all will be well and Epic will also do their part.
Looking forward to the final UE5 Fgear
To be honest, my programming skill is not high, so itâs hard for me to fully understand your code to do this. Can I ask you to do this and send the code to the mail please when you have free time? Itâs not urgent, of course. But you will help me a lot if you agree to help. Thanks a lot!
My mail - nichirivero@gmail.com
this is not a trivial feature, i tried client authoritative before, it has its own set of problems.
if i implement it successfully someday it will be available to everyone as an update, so no promises.
Hi, Yunus! Have you tried creating your own physics thread FGear to avoid issues with UE5 Substepping?
My research, copied ChaosVehicles plugin, moved all FGearPlugin parameters to ChaosVehicles, cleared ChaosMovementComponet and all references to ChaosPhysics, left only ChaosCallbackManager (now FGearCallbackManager), all TickCallback functions into FGear components, also left Sleeping from ChaosVehicles, removed FGearStickyTires, (still a lot of work to fix), but as a result, I now have a UE5 version of FGear that works very well with UE5 Chaos. No problem with Substepping. Perhaps this information will help you.
