Eraser vs black brush

[spsorrel]

Hello:

I have just noticed that when I try to hide part of an object or painting, Affinity Designer has different results depending on using Eraser or a black brush:

 

 

As you can see, both are masks.

Using brush tool selecting a 100% black, it doesn´t paint 100% and part of the rectangle is still visible.

Eraser paint 100% black and hide successfully the part painted in the mask.

 

I think this shouldn´t work like this, right?

 

Thank you very much.

 

 

[Michail]

16 hours ago, spsorrel said:

I have just noticed that when I try to hide part of an object or painting, Affinity Designer has different results depending on using Eraser or a black brush:
As you can see, both are masks.
Using brush tool selecting a 100% black, it doesn´t paint 100% and part of the rectangle is still visible.
Eraser paint 100% black and hide successfully the part painted in the mask.
I think this shouldn´t work like this, right?

With me it works as expected. What tool settings do you have?

[spsorrel]

Hello Michail:

By steps:

1. I draw the rectangle.

2. I change to pixel persona.

3. I take a basic brush:

4. I grab the brush tool.

5. I change colour to 100% black:

   

6. I keep opacity and flow at 100% and I do not protect alpha:

7. I create a mask keeping 100% opacity.

8. I paint and the result is:

 

I dont know why you get the part of the square completely hiden, but I cannot get that unless I use eraser tool...

 

Thank you very much.

[walt.farrell]

You're using a Hardness value of 0 for your brush, which gives a soft (sort of feathered) edge, as you can see at the right-hand edge of the blue part of your rectangle. It also would give you a smaller apparent brush size (narrower brush). Possibly with that hardness setting you need to go over the areas you're erasing again, to make sure you've really painted black over everything?

[spsorrel]

Hello walt.farrel:

That´s not the problem, I have passed the brush many times and the rectangle remains visible at its righ part.

Thank you.

[walt.farrell]

31 minutes ago, spsorrel said:

That´s not the problem, I have passed the brush many times and the rectangle remains visible at its righ part.

But did you try bumping the hardness to 100 to see if that resolves it?

[Michail]

11 hours ago, spsorrel said:

I dont know why you get the part of the square completely hiden, but I cannot get that unless I use eraser tool...

Thanks for the detailed documentation.
When I look at the result, I can only think of two possibilities:

1. The brush color is not really black. It looks more like a 90 percent black. Check it again. Draw a line and then double-click on the corresponding color field of the color selector.
    
2. You may have set an accumulation of less than 100%. Check this by clicking on the "More" ("Más") button at the top of the context bar.
   
    

• Do you work with a mouse or with a pressure-sensitive pen?
• Can you possibly attach the file?

[spsorrel]

Hello everyone:

20 hours ago, walt.farrell said:

But did you try bumping the hardness to 100 to see if that resolves it?

It shouldn´t make any different, but I have just tried and it gives the same result.

 

9 hours ago, Michail said:

Thanks for the detailed documentation.
When I look at the result, I can only think of two possibilities:

1. The brush color is not really black. It looks more like a 90 percent black. Check it again. Draw a line and then double-click on the corresponding color field of the color selector.
    
2. You may have set an accumulation of less than 100%. Check this by clicking on the "More" ("Más") button at the top of the context bar.
   
    

• Do you work with a mouse or with a pressure-sensitive pen?
• Can you possibly attach the file?

Yes, the accumulation is at 100%.

 

Thanks.

[Sean P]

Hi spsorrel,

Sorry for the delayed response. Is your document using CMYK? There is a known issue that 100%K doesn't fully remove masks when using CMYK.

[spsorrel]

Hello Sean P:

Thanks for the answer. Yes, I think it was in CMYK. I don´t really remember it, but I used to use the preset of A4 (ready for printing), and it is configured in CMYK.

I have tried in RGB and it works as expected: 100% black brush erase 100% the shape.

Thank you.

[spsorrel]

Hello Sean P:

Revising some questions asked time ago, I have been awared that this issue is not solved in the last updates, only for remember it to you.

Thanks.