A forest made with the example palm that comes with arbaro.
DJ
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These palms would look good on a shore line of an island or just a shore with a nice beach. I think it would be a good project.
There is a nice variation here. I would add a distribution shader to the blend input at the bottom of the population. Use the measure tool to get a horizontal distance across the landscape in the preview. About 1/3 of this measurement would be the scale for the density shader of the distribution shader. The Lead-in scale would be the full measurement. The smallest scale would be twice the population density. By doing this, it breaks up the regular look of a population. It helps make things look more 'natural'.
Let us know if you need help. We're are all at various learning stages and enjoy the challenges the software provides.
More variations in height/scale would really help.
Keep up the great work!