I render an old video with starlight sharp for a few hours every night. i output as TIFF.
I render the beginnings/ends with a little overlap so i can stitch easy. And i found out: different renders of the same scene have different sharpness!
Look at the 2 pictures. Look at the clock! its night and day!
Whats going on here???
yes I can see, that’s bad. This confirms my hypothesis that the quality of the running output can change a bit over time (more to better after time)
Concerning SLM now: If I start an output and check just a few minutes later the first result in the output view register; this looks worser than if I wait let’s say an hour and check same time index again.
At first I thought it was just my imagination, but now I’m sure that something happens afterwards with already rendered segments. I only do FFV1 outputs and therefore I cannot say if this is also the case with h264/h265/ProRes or not.
This is bad. This is realy bad. Especially with a slow model where you invest hours and hours in rendering…
but it probably doesn’t cover the whole video i think, only what is still in the vram can do changes to already written frames, since i have a 32GB card, the effect seems more noticeable.
important is keep your system stable, I have a second pc and running nonstop for days without problems (I use older V7.0.2), so I don’t use image output. What you always can do is copy current growing output file when there is a large project, then you have a backup what is already done
Then when it breaks, don’t continue where it stoped, go back a little bit and this quality difference should not happen when you join both segments into your video editor. Good segment starting points are always hard scene cuts
As the models run they do have a set frame count that they work on but this is an interesting situation that I am sending to the team for further review. The exports should be a lot close in quality as that is what the devs are going for with all of the models.
We will see what they can find out.
Thanx 
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