I am starting to work on a 2d top down tile-map game for fun and learning purposes. I have read some great answers here re tile-map size vs character sprite size, pixel density, ppu, screen resolution etc.
A standard route is to set a constant PPU and do characters as 2 tiles (vertically usually). We went with 32x32 pixels for the tile and 32x64 for the character.
Unfortunately, our artist didn't draw the character to fill out that space on the extremes (the feet and head do not touch the vertical edges and there is also space between the character and the horizontal edges) and when Unity slices the sprite-sheet we get smaller characters of 28x53.
I imagine this is a problem for keeping the consistency I outlined above with the tile size.
Is this a problem? If so, are the solutions to this to either change the tile size to 28x28 or ensure that the sprite design actually fills the tile space (that is, touching edges of the 32x64 area)? Must one draw items as always filling out the full tile size or can one make, say potions, in a 32x32 tile but only take up say 12x16?