Spray Tool - rotorz/unity3d-tile-system GitHub Wiki
Use spray tool to randomly scatter tiles onto a tile system.
-Use left mouse button to paint tiles using primary brush.
-Use right mouse button to paint tiles using secondary brush.
Fill Rate (%) : Rate at which to fill nozzle area with tiles. Use lower value to reduce quantity of tiles painted.
Hold Shift key to paint line of tiles from previously painted tile to cursor. Visual representation of line is shown whilst key is held as illustrated below:
Hold both Shift and Ctrl keys to paint horizontal or vertical line of tiles more easily:
Source: topics/Spray-Tool.md