PDF export ignores layer masks
Submitted by Simon Müller
Whenever I try to export an image with layer masks to pdf, the export plugin completely ignores any layer masks - no matter whether the checkbox "apply layer masks before saving" is active or not. In the resulting pdf the layers are stacked as expected but they have no transparent parts, so only the top layer is visible. When I apply the layer masks by hand before exporting, everything works as expected.
Expected behavior: Layer masks on image layers should cause transparency in the corresponding layers of the pdf.