Opacity masks ?

[ThomasAn.]

Is using the eraser tool (in a pixel mask layer) in pixel persona the only way ?

I am trying to implement opacity masks (vector objects that their transparency knocks out proportionally the underlying geometry). So a gradient from black to transparent would cause the underlying geometry to gradually fade. 

[Gabe]

Hi @ThomasAn.,

Welcome to the forums. 

That would be the only way. Alternatively, you can use the transparency tool ( y)- in vector persona- to create a transparent gradient. 

Thanks,

Gabe. 

[lepr]

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[ThomasAn.]

On 8/5/2018 at 3:48 PM, owenr said:

No.

Yes, Affinity apps do support masking by vectors as you describe.

You can drag and drop the masking object's thumbnail onto the target object's thumbnail (not its name) to mask-nest (not clip-nest) the former into the latter.

Alternatively, with the masking object immediately above the target in the stack, right-click the mask's thumbnail and pick Mask To Below, and the former will become mask-nested in the latter.

An example document: vector mask.afdesign

In it you will see that the mask-nested thumbnail has the vector-mask symbol in its bottom-right corner as shown in this enlargement:

 

Thanks for the reply, but ... you are describing a clipping mask, not an OPACITY mask. I already know about clipping masks in Affinity, they work nicely, but it is not the question at hand at the moment.

[lepr]

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[R C-R]

2 hours ago, ThomasAn. said:

Thanks for the reply, but ... you are describing a clipping mask, not an OPACITY mask.

I think you are probably confusing clipping with masking. If so, watching the Affinity Photo - Clipping vs Masking video tutorial may help. (While it is using Affinity Photo rather than Affinity Designer, the same general principles apply to both apps.)

[firstdefence]

@ThomasAn. What is the purpose of wanting an opacity mask?

The black background shows the opacity variation from the blue colour of the tear to the black of the background via the gradient of the globules that are used as a mask. 

[lepr]

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[firstdefence]

37 minutes ago, owenr said:

My masking object is not being clipped by the tear shape. Stating that it is could confuse a reader who isn't yet up to speed on mask-nesting versus clip-nesting.

The tear shape is being masked by the masking object.

 

 

Just read this post and the reply by A_B_C

 

[lepr]

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[firstdefence]

5 hours ago, owenr said:

OK. I've read it and it doesn't support you, in case that's what you are implying.

You said my masking object is being clipped by the object being masked.

A_B_C said an object being masked is being clipped by the masking object, which is the inverse relationship to yours, and somewhat similar to mine.

I said the object being masked is being masked by the masking object. That is not an identical relationship to A_B_C's. In only some cases  will these two relationships produce identical results from given objects.

Only my description accurately describes the relationship of the objects in the file I posted.

 

I wasn't implying it supports me owner, just that I get where you are coming from now.

[lepr]

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[firstdefence]

3 minutes ago, owenr said:

I see. That's a problem with the ambiguity of word "read". I interpreted it as you telling me to read a post, but you meant that you had read a post.

Correct, I'll try to be clearer and less ambiguous 

[lepr]

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[ThomasAn.]

On 8/15/2018 at 12:03 PM, owenr said:

I certainly am not describing a clipping mask. You have misunderstood what I wrote. I find it hard to believe that you even opened the example file that I supplied. Try reading and following the instructions carefully, and examining my document, and you'll discover that I told you the correct answer to your query.

 

 

 

No sir you did not.
Putting the spheres inside the droplet is not opacity masking and giving the spheres a gradient with a transparent end is not opacity masking either.

GabrielM was right. Other than using the eraser tool there is no other way to accomplish opacity masking at the moment (which is fine, the pixel layer does the job as well for now)
https://www.shutterstock.com/blog/mastering-opacity-masks-in-illustrator-2

[lepr]

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[lepr]

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[Gabe]

On 8/25/2018 at 10:34 AM, >|< said:

I did. Your failure to comprehend something does not mean that the thing never happened.

My example definitely does use opacity masking. It is done slightly differently than in Illustrator, but it is opacity masking by a vector object, nonetheless.

Wrong.  Either he was unaware that Affinity apps support opacity masking by vector objects, or he forgot about it when replying to you.

 

 

Your example not masking. You clipped a shape with a gradient from Black to Transparent. You would achieve the same effect using the transparency tool mentioned on my first. 

[lepr]

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