printer prints white background although Motiv is set to transparency

[thomaso]

1 hour ago, Old Bruce said:

In other words, Serif would have to do some massive rewriting of their printing system to accommodate the Oki printer.

25 minutes ago, BofG said:

I'll try again in case anyone pays any attention, the white toner Oki printers ONLY have PostScript drivers. The PostScript is needed to handle the advanced white options. Affinity does not do PostScript.

In this thread the issue does not occur when printing from Affinity. It is rather the way Affinity creates / does not create a "true" clipping path. As the 😽 example above illustrates it is not even related to print but appears the clipping mask doesn't get recognized / displayed on screen in the Preview.app.
( @Hangmann, in this file the clipping path IS a Layer Mask)

[thomaso]

11 minutes ago, BofG said:

I have RTFM on these printers (was looking to buy one a while ago), you need PostScript support.

I had noticed your hints about your printer / driver research + Affinity postscript.

But isn't the question rather what Affinity does to a masking clipping path to prevent it from fully working? I assume Affinity in fact IS generally able to output Postscript, e.g. in exports as PDF or EPS, correct? If not, why does it export EPS at all which literally says "encapsulated POSTSCRIPT"?

I mean, the cat example (created, exported, reopened in Affinity) illustrates the lack of path interpretation in Preview … caused by the way Affinity writes the path into the file / Preview reads the path from the file.