Elegantly transition from 4-grid to 6-grid and back

I find in general map creation that I prefer hex grids for natural environments, but square grids for interior and urban/constructed environments.

Is there a smooth or elegant way to transition between these that doesn’t require a scene break? Most importantly, is there an intuitive way?

As long as they don’t differ too vastly, the ratio of sizes between the two cell types is largely irrelevant to me. I’d also happily use several rows of transitional tiles if their borders can be procedurally determined. I also have no inherent preference for up-point or side-point hexes…

I’d show some things I’ve already tried, but they are genuinely all varieties of the same eldritch mess…