02-17-2020, 05:19 PM
(02-17-2020, 03:22 PM)Ofnuts Wrote: In my experiments Save Layers/No save layers made no difference, but of course I had a singe layer.
My results, using your Tiff-noAlpha single layer file, involved doing nothing different but check/uncheck Save Layers. Are you saying that does NOT occur when you do it?
Also, I've now determined that leaving Save Layers checked seems to solve the problem of undesired alpha channel creation and associated increase in size (3 to 4 bytes per pixel) but NOT the incompatibility problem. To make tif files created by GIMP recognizable by DPP4 I still need to recreate them using other software such as Rawtherapee.
From what I've recently noticed this Save Layer option was introduced in GIMP 2.10.12 which is too new for my previous assertion that this problem is one that I've dealt with for a long time. I think that is explained by this finding which suggests that it is the lack of compatibility that I've been dealing with for a long time with the size problem being something that arrived with 2.10.12. In my case the files in question are always single layer files.
While unchecking the Save Layers option now appears to have caused an alpha channel to have been added where none was intended, I'm still curious? Why is that?
The compatibility problem appears no different now than back in 2018 when I made this post.