Strange Flickering occurs when virtual camera is switched

Unity Engine
,
1

I wonder if this is a bug, or if there is a setting that I misunderstand.
(HDRP 2021.3.14f1)
Occurs when HDRP Quality is a specific setting
I’m not sure exactly which parameters are causing the problem.
I attached TEST_Quality.zip.

reproduction of the problem in the HDRP demo scene
8652594--1164516--cm.gif 8652594--1164519--upload_2022-12-2_4-52-5.png

Create two Virtual Cameras.
Camera Blends style is cut.
enter playmode
Set Active On/Off the vCam object to switch the camera
There’s a strange flashes occurs

8628684--1159611--upload_2022-12-2_4-58-57.png
8628684--1159611--upload_2022-12-2_4-58-57.png1083×615 660 KB

8652594--1164525--upload_2022-12-2_5-7-34.png
8652594--1164525--upload_2022-12-2_5-7-34.png1207×685 637 KB

8652657–1164555–TEST_Quality.zip (2.89 KB)

2

This is possibly a bug in HDRP relating to temporal effects reset (which is invoked on a CM camera cut). Will try to get some HDRP team eyes on this one.

3

Thank you so much.
A few days later, I confirmed through additional tests that this is a good issue for HDRP Forum rather than Cinemachine.
(Without Cinemachine, i able to reproduce the problem with additional scripting with a normal camera)
I’m very sorry. Failed to delete the article i created in this forum.
(Is there a way to delete thread?)

So I wrote an additional thread to the HDRP forum
https://discussions.unity.com/t/902877
But I was nervous because there was no interest…
It’s very encouraging to hear that you’re helping the HDRP team get interested.

I am using several Unity forums,
and the employees working at the Cinemachine team seem to be the kindest and most interested.
Thank you always for your kind help and interest.

2 Likes
4

Hi, thanks for the report,

the issue have been found and a fix will be available in next revision of the various version.

In the mean time, this is the diff of the fix

8658810--1165926--upload_2022-12-13_19-2-0.png
8658810--1165926--upload_2022-12-13_19-2-0.png1749×1267 145 KB

3 Likes
5

Thank you for the good news!

  • Can I apply it temporarily?
    Is it safe to modify the package file that is in the ReadOnly state, and is it possible?

  • next version
    Does it mean 2021.3.16?

6

you can apply it locally, you will need to fork the package (duplicate the source code and edit it), otherwise indeed your change on the read only package will be override each time you open the editor.

  • next version
    Sorry for 21.3 I am not sure exactly when the fix will land and officially out - with christmas vacation even harder to predict, so maybe mid january
1 Like
7

Is this applied to 2021.3.17f1?
I tried to find the information in the release note, but I couldn’t find it well…
Is there any way to see UUM-XXXXX cases without links?