Horrible green cast in Helicon Focus stacks

[wake689]

Sorry - my mistake. Please ignore my last post

I now see that you were waiting for me to send two pictures that have the problem. I have tried but I get an error message when I try to attach a RAW (.cr3)

[Catherine]

Please send them here.
What did the error message say? I mean just the gist of it.

[wake689]

The error says "Error
Invalid file extension: untitled-3976.CR3"

I have uploaded to the link you sent a RAW and a JPEG that when imported to Helicon focus as a stack and rendered cause a green cast. The jpg was created by my Canon R6ii from a stack and the cr3 RAW is one of the RAWs from the stack that the R6ii used.

[Catherine]

Thanks, got it, we'll see if there's a simple fix. The proper solution will still always be to not mix JPG and raw images (raw and non-raw,in general), because the color profiles are not interchangeable between them. That is likely the reason for the color shift you're observing as well.

[wake689]

Unfortunately my Canon R6ii "hides" the .jpeg it creates in amongst the RAWs it used to create them. And then when importing into Helicon focus, of course the jpeg gets converted into a dng so you don't realise that "hiding" in the .DNGs in Helicon focus is one DNG that was created from a jpeg.
This can be overcome by the user being aware of the potential problem and using lightroom's "sort by" options to alter the order of the images inm grid view.
I wonder if it would be possible/practical/desirable for a warning to be issued when one picture in stack being imported is of a different filetype from the others?
I guess it depends on how many people are experiencing a problem.

[Catherine]

Converting JPG to DNG is a suspicious operation which makes no sense because JPG is not a raw format to begin with. Once that's done by Lightroom, I'm not sure there is anything we can do. But maybe. We'll check.

[wake689]

Would it be reasonable/practical/desirable to check all the imported DNGs use the same colour space?