The Resumable Render for Cycle allows you to add some Samples steps when rendering your image from the command line (as far as I understand)
"This feature is also known by the name Samples Offset, which allows artists to render animation with given amount of samples N, but then render more samples, starting from N and ending with M (where M > N) and merge renders together as if they rendered exactly M samples.
Surely such effect could be achieved by changing Seed variable, but that has possible issues with correlation artifacts and requiring to manually deal with per render layer samples and such."
This new feature is in the master but not on the release yet afaik,
however I cannot find out how to use it ;
the links says:
"Here's a command how to run Blender with the new feature enabled:
blender -- --cycles-resumable-num-chunks 24 --cycles-resumable-current-chunk 2
This command will divide samples range in 24 parts and render range #2 (chunk number is 1-based)."
at the moment I am trying: blender-b test_render_resumable.blend -f 0 -- --cycles-resumable-num-chunks 24 --cycles-resumable-current-chunk 2
then 3, 4, etc.
I get an image I backup everytime, but don't know how to merge all of them, and not sure that's the correct way to do.
Does anyone know how to use it?