Random colour artifacts/ black blocks being introduced when colour grading.

[dougm36216729]

We are having a major issue since the upgrade to pp2018,  random artifacts appear to be being introduced when we apply any colour adjustments...

This Is appearing entirely random in the timeline during the edit and previewing,  and then in different places again randomly when rendered out in the final output. 

Again render a second time,  and the artifacts are in different places.  

Secondary grading appears to introduce more issues,  but even primary grading is introducing issues on occasion.  

Turn the colour adjustments in the lumetri panel off... they disappear...  turn back on again, they reappear randomly.

This has just started since the upgrade.  (Ps;  urges are now also rubbish,  but thats a separate issue.)

We are Mac.   This is happening on multiple 27' inch iMac 17 machines,  on multiple projects.

If we grade in resolve,  we don't have an issue.

Here are some frame grabs of the problem...  See top right of frames... whilst this appears to be the dominant location,  they can also appear left hand side..  footage is 1080p 25fps

If we can't solve this,  We are gonna have to dump premier.

[Ann Bens]

Please do not double post

Removed the screenshots as they take a long time to load.

[Guest]

Thanks for policing the forums. I commented on this but still started a new one because it doesn't directly apply to the problem here talking about it happening with a color grade. So commenting on one thing and posting my own = 1 comment and 1 post....not double posting

[ToSt]

Hi everybody,

I have the same problem on Windows10. After Updating Win (from 8 to 10) an PPro (to newest version) I have a pixeled screen when applying lumetri engine. Only switsching to "Mercury Playback Engine Software Only" solves the issue. None of the others here listed helps. Is this problem already known?

Thanks for replying.

Bests, Tobias

[R Neil Haugen]

Tobias,

We'd need your OS/CPU/GPU and the driver used by that GPU to tell. Something like this is nearly always an older GPU or a bad GPU driver.

Neil