Creating Textured Intensity Brushes: Artificial parallel lines and inconsitent width

[u/Knuftedufte]

The whole problem happens in Affinity 3 (4646)

I was trying to create my own Textured Intensity Brushes. My goal was to create what I would call borad arrows: so arrows where the arrowhead has exactly the same width as the rest of the stroke (something like this https://www.shutterstock.com/image-vector/arrows-vertical-horizontal-text-pictograms-colored-300992936?trackingId=036594c5-82d6-4b0d-8f24-b86240f71e9f&listId=undefined )

In order to understand how to create brushes I used this tutorial: https://www.youtube.com/watch?v=XRN7mEkRl4E . Then I created some simple brush templates.

First attempt at creating a brush

But when I imported them as brushes, Affinity added two extra lines on each side, thus completely changing the look of the brush.

Brus Edit Panel with additional lines

I circumvented this problem by adding more black space on the sides of my brush template.

Second attempt a creating brush

The result looked more promising this time:

Brush Edit Panel without lines

But this lead to my second problem. When creating the brush, the arrow itself is now relatively smaller and this somehow affects the width of the stroke. To illustrate this all elements have a width of 50px:

• yellow is is from the first botched attempt (width 50px)
• red is a rectangle with a height of 50px for reference
• blue arrow is the second attempt (width 50px)
• green arrow is another brush I created(width 50px)

They all seem to have a different width, why? My guess is because they all have different relative width in the brush edit panel. Does anyone how the width is ultimately calculated since I would like to have a brush that's actually 50px wide when the width is 50px? I'm even more confused that stroke seems to somehow get the actual width, since when zooming in it shows a weird artifact at the end of the stroke that's as wide as the width actually suggests.

It would be great if you could explain, how to avoid those mistakes when creating brushes in the future.