PDF export missing raster layer if Blend Mode is Multiply and Mask labels

[dgreenewalt]

What is the bug or the crash?

Export layout or map to PDF with 2 raster layers. One layer set to Blending Mode = Multiply. That layer is not exported. If set to "Normal" and transparency 50%, both layers export, but not the desired effect.

Steps to reproduce the issue

load 2 raster (tif) layers
set layer 1 display to normal blending mode
set layer 2 display to multiply
"export map to PDF"
or create layout and "export as PDF"

Versions

Windows 10
not working in 3.26
working with 3.24

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[dgreenewalt]

The offending layer looks to be a vector layer (contours) with labels (elevation) using masking. If mask is unchecked, the layers export as in the screen display. If mask is used the underlaying raster does not display.

[gioman]

The offending layer looks to be a vector layer (contours) with labels (elevation) using masking. If mask is unchecked, the layers export as in the screen display. If mask is used the underlaying raster does not display.

@dgreenewalt seems to work fine in the same scenario here (3.26.1), could you attach a small sample project?

[dgreenewalt]

testing.zip
Here is a link to geopackage including data and project.

https://ln5.sync.com/dl/2f8a2b5b0/abvveu62-8h9bgj5m-ay87kzth-6zxcch8g

export the view or layout to pdf (or jpg) and the hillshade layer doesn't show. I can't use raster with "Multiply" (transparency does work) or contour labels with masking.

Thank you for looking into this. Maybe a project setting I have wrong? I've tried these 4 layers in a new project with no luck.

[dgreenewalt]

Tested with version 3.26.2 - same result. Raster layer #2 does not export if label masking is active.

[FeroS66]

This bug is still in 3.28.4 version.
Exports to TIFF or PDF does not accept multiply setting of the overlay layer when there is vector layer with mask enabled.
In 3.22.15 version everthing works fine.

[toineR-31]

test with 3.28.8 LTR and 3.32.0 and the problem is still here.

[FeroS66]

3.28.9 LTR - problem not solved.