"Blur Tool"

[Jörg_R]

"Blur Tool"
Why is it possible to adjust the opacity, the flow and the hardness of the blur tool from 0 to 100 % when even at the highest strength almost no change can be seen?

[firstdefence]

Can you demonstrate the effect or lack of it that you are seeing?

[Old Bruce]

18 minutes ago, Jörg_R said:

"Blur Tool"
Why is it possible to adjust the opacity, the flow and the hardness of the blur tool from 0 to 100 % when even at the highest strength almost no change can be seen?

I have to admit that the blur tool is so very subtle that many times I won't use it. I will use a Live filter with a lot of masking.

[firstdefence]

Also the 100px is not the end of the blur, type in 200 or 300px

[Jörg_R]

look here....

 

if  do the same in photoshop with a resolution with 72 dpi I cannot use 100 % strength because it is too strong, but here I see nearly nothing.

Where is the mistake?

[Old Bruce]

11 minutes ago, Jörg_R said:

Where is the mistake?

The only way I can reproduce what I see in the video is if I do not click drag with the trackpad or my pen graphic tablet.

A thing to consider is what brush you are using. I chose the most basic brush and had no problem blurring (quite slight I will admit) If you have a brush that is quite transparent to start with then the effect will be almost none existent. Try with a brush from the Basic category and with a hard edge too.

[Jörg_R]

.... this is no brush, this the Softener Tool!

[Old Bruce]

You need a brush from the brush palette to make it work, the last used brush will be chosen by default.

[walt.farrell]

8 minutes ago, Jörg_R said:

this is no brush, this the Softener Tool!

If you use the English User Interface, or the English Help, it is the Blur Brush Tool.

[Jörg_R]

Ah ok, Walt... But it still does not work properly

[Old Bruce]

6 minutes ago, Jörg_R said:

Ah ok, Walt... But it still does not work properly

Does it work if you choose a Basic Brush from the Brushes palette?

[walt.farrell]

28 minutes ago, Jörg_R said:

Ah ok, Walt... But it still does not work properly

What OS do you use?

If Windows, do you have Hardware Acceleration on in your Affinity Preferences? If so, try turning that option off.

[R C-R]

2 hours ago, Jörg_R said:

if  do the same in photoshop with a resolution with 72 dpi I cannot use 100 % strength because it is too strong, but here I see nearly nothing.

Where is the mistake?

I think you are seeing very little effect because you have the brush hardness set to 3%:

But even at 100% hardness, like @Old Bruce mentioned, the effect of the AP Blur Brush Tool is fairly subtle, so unless there is a lot of very strong pixel-to-pixel differences, you probably won't see a lot of changes.

[NotMyFault]

The blur brush uses a box blur with radius 1px. It gives a very light blur effect on hard edges. 

If you want a stronger blur effect, you can use a different non-destructive approach:

• Add any live blur filter (e.g. Gaussian blur)
• set radius as required e.g. 1, 2, 4px.
• invert layer
• use soft basic round brush in white
• use low brush opacity e,g. 12-25%
• brush over blur layer to apply effect
• if too strong reduce layer opacity 
• or use erase brush to remove blur

 

[hawk]

The hardware acceleration issue affects macOS too, at least on my M1 MBA.

But even with acceleration turned off, I often find the blur brush tool too weak for my purposes, even with the basic brush.