External Raster Masks

Raster Mask root folder is set in prefs, but every time I apply a pfm it comes through rotated left and stretched.

Version is darktable-5.2.0-arm64.dmg from the GitHub dir.

Mask in greyscale, ex Photoshop, then opened in GIMP and exported as pfm.

Am obviously doing something wrong!

*Also, imported the exPs greyscale image into DT then exporting as PFM to the raster mask root dir - same result.

I see orientation at auto …must not be correctly interpreted…you could likely adjust that at least see if that is the issue

Cheers Todd, it’s a bit of a clunky process, involving GIMP at the moment, but I can now actually get complex subject selections etc from Photoshop into Darktable.

All masks are modified in processing modules if there is distortion, cropping, rotation or orientation. So this is working exactly as designed i would say.

Thank you so much for such a helpful and instructive reply.

Specifically for the example in the initial post:
Could it be that the base image has a rotation in the metadata, and the mask doesn’t (as it is saved in the correct orentation)?

Reasoning: mask (in portrait orientation!) is loaded and stretched to fill the image (natively in landscape orientation), then both are rotated acording to the EXIF information

Hi, thanks to Todd for putting me on the right lines.

It appears that nikons auto rotate tall isn’t getting picked up when the raster is imported. But I have found an easy way around it.

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