Necromancer's Tomb

[Falconius]

Aligning the drawing to a grid is only a convenience, but it's not necessary. Foundry VTT has a "gridless" option for a scene (map) for instance, that said it's basic unit of measurement is still based on a grid. The other area it comes into issue is with walls and incomplete squares. For instance if the DM has the scene with grid on, and there is a square that is blocked halfway by a wall the player may not be able to move there, or if they do, they might see past the wall for instance. Diagonal walls and circles are where this occurs more often. I'd suggest if such an area occurs in your map just try to leave it roomy enough for full squares to exist. So, like, don't make a narrow diagonal hallway.

Personally I hate grid based map construction, because it's very silly in terms of realism, but I think that it is by far more common for DM's to use grids than it is to play without.

The map you have there would work perfectly fine in a VTT. Though I would suggest that you actually write down the grid dimensions so that the DM doesn't have to fiddle around trying to get the right grid resolution. If it's 72 pixels per square just give that info at the same time or same place the map is downloaded. Foundry measures the grid from the top left corner (which is also the default in most drawing and painting programs as far as I'm aware).

[psyekl]

Good info here. Thanks.