banding light dark enviroment,help please!

[gpr]

Hi!
hope you can help me resolve these issues.
I'm new in octane, still learning, after 3 days searching for answers, I couldn't find anything about it.

the first frames after a while banding

here you see the problem.
I add noise to my floor material
decreased the light to a minimum
when I start rendering animation everything is fine, after, I don't know 25 frames start banding.

some of the lastes frames looks fine

you see that at the bottom looks like some frames are not rendered. ( they are there but with problems)
you can see last frames are fine until the animation is finished, after saving them all with banding issues
here some details

here some details

buffer -tonemapped--- path tracing

if it needs any other info, just ask, please.
hope you can help me.
this start just recently
I don't make any changes in my way of rendering, so I don't know why this is happening.
waiting for your comments.thanks in advance.

[bepeg4d]

Hi,
C4D has a limited memory assigned to Picture Viewer, the green dot indicates that the frame has been loaded in memory, while the gray dot means that it is not.
So, nothing serious, in my opinion.

About the settings, please, always use the Geometry Control set to All Object Movable, instead of Auto, and, most important, don’t save you animated render directly in AVI or MOV or any other movie file format, but always save your frames in PNG or EXR sequence.
ciao Beppe

[gpr]

bepeg4d
thanks a lot for your comment, recommendations!
about loaded frames, ok, that was a question that I wanted to know the why, thanks.
about how to save frames, also, thanks a lot.
do you have any recommendations about banding ?
do you think that changing all that you pay attention, this issue will be fixed?
I'm new I don't really sure.
anyway , thanks for your time

[bepeg4d]

Yes, if you save directly in a movie format, the frames are compressed during saving, and the quality is lost (banding effect, coloring, and so on).
Save the frame separately to preserve the quality.
ciao Beppe