Game development

Godot atlas grid planner

Calculate TileSetAtlasSource grid size with margins and separation.

Your inputs

Start with an example

Example result

Columns = floor((width − marginX + separationX)/(tileWidth + separationX)); use the same calculation vertically.

A 256×128 texture with 32×32 regions, no margins and no separation fits 8×4 tiles.

Godot margins offset the grid origin; they are not a border subtracted twice. Internal texture padding does not change this source grid.