Clipping vector mask results in rasterized image

[thadeusz]

When using a vector clipping mask on PDF export my image ist rasterized. When removed (and in my case I could just hide outside areas with a white object) everything works as expected and noting gets rasterized.

Maytown-Button-1.afpub

[DWright]

Can you please confirm the PDF export options that you are using.

[thadeusz]

I'm using PDF 1.5 (Acrobat 5), CMYK, FOGRA 39, color space converted, Rasteriziation only for unsupported features. This is my normal export preset for printing CMYK.
As I wrote, when clipping mask is removed, the same document with the same preset is not rasterized.

[joe_l]

14 minutes ago, thadeusz said:

As I wrote, when clipping mask is removed, the same document with the same preset is not rasterized.

How about a different order for your clipping mask?

Maytown-Button-1-clipping.afpub

[thadeusz]

Hm, that works. But how is it done?
For clipping I'd normally take a vector element, fill it and then drag it onto a group or object and it becomes a vector clipping mask.
I'd be interested to know, how you have done your clipping mask.
Thanks!

[joe_l]

9 minutes ago, thadeusz said:

I'd be interested to know, how you have done your clipping mask.

I just dragged the Group into the Clipping Mask (no fill or stroke colour).

[thadeusz]

Thank you! That works fine for me.
So, it's better to forget the other way to create a clipping mask. For me that's clearly a bug, that needs to be fixed - beside having a different way that works.

[Alfred]

47 minutes ago, thadeusz said:

For clipping I'd normally take a vector element, fill it and then drag it onto a group or object and it becomes a vector clipping mask.

That’s masking or cropping. For clipping, you need to do it the other way around, as @joe_l described:

36 minutes ago, joe_l said:

I just dragged the Group into the Clipping Mask (no fill or stroke colour).

 

 

[thomaso]

7 minutes ago, Alfred said:

That’s masking or cropping. For clipping, you need to do it the other way around, as @joe_l described:

Like the OP I would expect both ways to work the same, in particular because Affinity has a special tool for such moments:

• The Vector Crop Tool. This is also known to force resampling for cropped images on export – whereas a Picture Frame does not.

• Is there any technical reason or need for rasterisation on export?
• And why only for 1 of 2 ways?

[Alfred]

4 minutes ago, thomaso said:

• Is there any technical reason or need for rasterisation on export?
• And why only for 1 of 2 ways?

I don’t know, Thomas. It may be related to the fact that a cropping object completely disappears from view but the parts of a clipping object that lie outside of the target remain visible. However, that’s just guesswork on my part.

[thadeusz]

It doesn't matter, how you call it. It's the same thing I'm trying to achieve, but one of them is rasterised without any reason. For me it's a bug.

[thomaso]

1 hour ago, Alfred said:

It may be related to the fact that a cropping object completely disappears from view but the parts of a clipping object that lie outside of the target remain visible.

Unlikely. Here the orange cropped object is fully visible (visually un-cropped) but gets rasterized – while the green is truly cropped but NOT rasterized.

–>

Rasterization seems to be caused by the involved Group layer. Note, the mask is nested inside the Group + the object is below the mask. So the mask is neither nested in the object (as with the green object) – nor is the object nested inside its cropping mask – as it would be in a clipping mask with the group as nested object.

However, here the rasterization appears not only confusing but unnecessary, too. – I agree, it occurs buggy.