Foundry VTT Grid Alignment Settings
EDIT: Splitch0 in the replies to this comment offers a different method that may be both simpler and better than mine! Check it out if you don't have any luck with my method.
First, set the MCT’s Hexagonal style to Regular instead of Roll20. (This setting reverts every time you restart the MCT, or navigate away from the Map Editor screen!)
In Foundry…
- Grid Type: Hex Rows - Odd
- Grid Size: 76
- Image dimensions: (same as image itself)
- Padding Percentage: 0.25
- Offset Background: Horizontal 38, Vertical 2 (you may need to play around with this depending on your map's dimensions)
- Turn Grid Opacity all the way down so that it's hidden.
The larger your map gets, the less accurate these settings get, as the offset gets more pronounced towards the edges of the map. With as much room for variation as the MCT allows for, I strongly doubt there's one universal set of settings for all possible maps. But these settings should work just fine, for the most part.