Blending between two virtual camera causes depth of field jitter

Hello,

I have a problem with two cinemachine camera I blend in the timeline.
Both cameras have a volume attached, with depth of field and vignette.
When the fading from camera 1 to camera 2 is finished, I get for short moment a jitter with bokeh of the background. What causes this and how can I avoid it? That cleary distracts my movie.
So it seems Unity is for one frame not taking both volumes into account?

 

Anyone? Can I expect that this get fixed?

 

Confirming this issue - it happens for me during the first and last 2 frames of a transition - so if I have two virtual cameras in the same position with a different PP volume for each but the same DOF settings applied, there are 2 frames at the start and end of the transition where the DOF becomes noticeably blurrier and gives it a 'pop' effect.

 

Thanks, I assumed the bug is not only in my project. So either it is an interpolation error in the Cinemachine code or it is complete by design in the DoF shader in HDRP. I may wait what HDRP 7.2.0 brings this week before submitting a bug case but I'm not sure if it is just Cinemachine related. Would be interesting to try DoF blending with traditional Unity cameras.

 

I already have a global volume with Depth of Field. So I need to add another global volume as a component to my main camera? With a higher priority? And then which settings should the Depth of Field have for this profile?

 

I'm afraid this does not solve the issue. Still get the jitter.

 

I can confirm this fix works - but only when I set the main camera DoF quality to 'Custom' - even if I don't actually change any exposed settings... But thanks!!

 

If I make it like in his screenshot, it just overrides the DoF profiles I set up for my cutscene cameras, which is even more worse, because then I have no bokehs at all.

 

Weird, for me it doesn't seem to matter what I put into the main camera settings, it doesn't affect the scene DoF at all (which is driven by the VCams). For reference, my setup is to have 2 VCams with individual volumes on both, that only contain a DoF effect, and then a single volume on the main camera with only a DoF effect - I haven't adjusted weights or priorities at all.

 

The thing is, I already have a global volume, which contains more effects than DoF.
But the global volume is not attached to the main camera.
Even if I give the volume for the main camera a higher priority, it fixes nothing.

The bug seems to come from different DoF quality settings. The DoF quality of the global scene volume can be tweaked in my game in a settings menu. But for cut scenes, I force the virtual cams to use high quality for DoF, otherwise I don't get good bokehs.
Nevertheless, between the two virtual cams, which have both high quality DoF, the single frame fallback to the main global volume quality setting should not happen (in case the player decides to toggle the DoF quality to anything than high.)
So the workaround is to have the same quality of the DoF the scene's global volume until a bug fix arrives. I made a little script that changes the global volumes DoF quality to high before a cutscene and after that switched back the player's setting.

// Unity Bug: Fix Depth of field. Has to be the same quality as the cutscene cameras.



        if (Engine.globalVolumeProfile != null)

        {

            if (Engine.globalVolumeProfile.TryGet(out DepthOfField depthOfField))

            {

                depthOfField.quality.value = 2;

            }

        }



        // Start cutscene.



        Engine.cinematicActive = true;

Despite the issue with DoF, I also noticed there is no smooth blending for the Lens Distortion effect. It simply turns off between cam 1 to cam 2 despite I have a blending curve of several seconds in the timeline. So this looks really bland.

 

I understand that the different focus mode is a problem. But again, the problem is, that Cinemachine takes the global volume into account while it should only lerp the Cinemachine volumes between two cameras in the timeline.

So my question is, will you fix it, should I submit a bug request or do you have it already on the track?

 

It don't want the focus mode to be blended. I have for all my cut scene camera the same DoF mode, which is manual. The problem is just Cinemachine switches back to the global volume between camera blending in the timeline for one tiny frame. It should just blend the Cinemachine Volume settings in the timeline. I'm fully aware that some things cannot be blended, but I expect Cinemachine to take Cinemachine volumes into account when blending. So a Cinemachine volume should be a global override.

Cinemachine Cam 1 Volume -> blend (ignore global scene volume when override is active) -> Cinemachine Cam 2 Volume

and not:

Cinemachine Cam 1 Volume -> blend -> short jitter global scene volume -> blend -> Cinemachine 2 Volume

 

Ok, thank you, I will stay tuned for this update and inform you.

 

Any updates on this issue?

 

Sadly, I cannot upgrade from 2.5.0. You changed something with the FreeLook Camera. When I upgrade, my player camera behaves different then before. It will adjust the vertical Axis automatically, making the player camera looking to the ground, really weird. With 2.5.0 it's not the case.