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using layers from openEXR as mask


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I imported an openEXR image with a bunch auf b/w-layers (Object buffers from C4D) into Affinity Photo. I tried to use them as mask right away, but that didn't work. Instead I have to "rasterise to mask" each one of this layers. The resulting mask layer can be used in the expected way.
There is no hint in the help what "rasterise to mask" actually does. (To be honest, there isn't even a topic about that.)

What are the properties that decide whether a layer works as mask or don't?

 

edit: It seems that b/w-images generally can't be used as mask in version 1.5.1.54 anymore...

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  • 4 weeks later...
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It seems that b/w-images generally can't be used as mask in version 1.5.1.54 anymore...

 

I've just tried this in 1.5.1.54 and it seems to be working as expected with both colour & B/W images.

 

Rasterize to mask takes the luminance values within the image and makes a mask from them.

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