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My question starts off here: Creating random point polygon fill symbology in QGIS?

In addition to the random point pattern fill of a polygon, I want my points not to be clipped by the polygon boundary. How do I go about that?

Currently, my layout looks like this:

enter image description here

I want the trees to exceed the outer boundary like they would in real life.

I've seen this script here (https://gis.stackexchange.com/a/337774/200736), which seems to be a starting point but my understanding of the syntax is too poor to see where I exactly I would need to make the necessary changes.

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    – Ian Turton
    Commented Feb 14, 2022 at 16:26
  • is there a limit to how far they go? if so a buffer could help
    – Ian Turton
    Commented Feb 14, 2022 at 16:26
  • There is no definite limit - about 5-10m on scale would be appropriate I think. I thought about the buffer but since it is just a point pattern fill (i.e., I did not map every single tree), I do not see how a buffer would help (maybe i'm just not getting it right now). In my understanding it would still lead to my trees being cut off at some point. Could you clarify?
    – Niklahrs
    Commented Feb 14, 2022 at 16:32

1 Answer 1

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Solved it myself (at least sufficiently for me):

I added a symbol layer to my polygon and changed it to 'Marker Line'. Then I changed the Marker to 'SVG Marker' with a size of 8 Meters at scale and chose my tree symbol. In the 'Marker Line' section 'Marker placement', I activated a data defined override and changed the interval with the following expression:

randf(3, 8) - for a random interval between 3 and 8 map units (in my case, meters).

Looks like this now:

enter image description here

Of course, I could still optimize the randomization and also randomize the size of my outline tree symbols.

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