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Am I the only one who did not know about this?

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While editing an old eps file I had imported into Affinity Designer, I tried to use a Boolean Subtract to convert 3 curve layers to a single Curves layer with 2 transparent holes in it. I have done this a zillion times without problems but for these 3 curves what I got instead was no transparency, something like this:

subreact.png.b76fa9a1dc546226a54ba795bcc6842a.png

It took me much too long to figure out why, but the reason is simple: by default, shapes are assigned the Alternate (Even-Odd) fill mode. For whatever reason, the shapes in the old eps file all used the Winding (Non-Zero) fill mode, which for subtractions like this one fill everything.


Affinity Photo 1.8.2, Affinity Designer 1.8.2, Affinity Publisher 1.8.2; macOS Mojave 10.14.6 iMac (27-inch, Late 2012); 2.9GHz i5 CPU; NVIDIA GeForce GTX 660M; 8GB RAM
Affinity Photo 
1.8.2.174 & Affinity Designer 1.8.2.4 for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 13.3.1

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