What is the point of islands in this implementation?

[NowBothWhiteAndRed]

Looking through the library I'm wondering what the point of islands/migration is here.
Typically you have multiple parents/crossover functions to facilitate genetic mixing between parents on islands. And migration to bring new ideas to islands occasionally.

But here we have a mix of MAP Elites and single parent lineages with mutation. The only source of information from other parents during child creation is inspirations and inspirations are sampled using the feature grid which ranges across all islands.

So why bother with islands and migration at all? Seems like you should either restrict the inspiration pool to islands of the parent and only break that barrier during migration or else forget about islands entirely.

[codelion]

Thanks for reporting, this is an oversight since island based evolution was added recently and the original implementation was not using it. I will take a look at it and try to fix it.