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I’m thinking to start my first pathfinder game as a DM, and I want to use hex grid instead. Except a small paragraph in the Gamemastery guide, I cannot find many info on it.
For this reason, I have made my own area pattern: hex grid area
What do you think?
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I'm a little puzzled by the point of origin for your lines, why do they start at a vertex instead of on an edge of a hex?
Apart from that, there isn't really a big theoretical problem with using hexes, it's pretty straightforward how to calculate distances and all that. Certain issues like how to map a circle to the grid result in somewhat nicer shapes than using a square grid. (Pathfinder is one of those games where "squaring the circle" becomes a literal and not just a figurative problem.)
I'd say the main deterrent from using hex grids is that they're not so ideal when using indoor maps, which tend to have a lot of 90° angles. It's pleasant if the grid and the thing you're drawing on the grid are in agreement.
That said: quite often on square grid maps you see diagonal tunnels that are there just to break the monotony of everything being aligned. But which result in a lot of "so can I stand in this half-square or not?" quibbling. I usually resolve that with the 50% rule of thumb: only if MORE than 50% of the square is unavailable, does it count as blocked.
My big reason that I want to used a hex grid, I have made 3D tiles for Gloomhaven, and I want to use it. After playing Gloomhaven, it’s not so bad to play interior map in a hex grid.
For the line, if you check the area pattern in the book, it seem to be in a corner.
I'd say the main deterrent from using hex grids is that they're not so ideal when using indoor maps, which tend to have a lot of 90° angles. It's pleasant if the grid and the thing you're drawing on the grid are in agreement.
You can solve this making the map more isometric. Instead os align the map inside structures a square you can align then in lozenges this allow to use of hexagons in a square are with minimal loose of effective area (you still lose some edges but it's doesn't affect the effective area). But this is only good if you already have isometric maps or your are creating your own.
For what it's worth, your 15' cone's covering 9 hexes is somewhat overpowered. If you had it begin in only one adjacent hex, it would be better balanced.
Generally speaking the area of a hexagon is about 2.6 times the size of the area of a square. I think all the bursts and ones are going to need to be recalculated. The best fit is probably not going to result in super clean lines since the line across 2 corners is 7 ft, not 5. You probably want to treat all straight lines in your hex grid like diagonals on a square grid: 1 hex 5, 2 hex 15, 3 hex 20, 4 hex 30, 5 hex 35.