Radius

Enlargement of a single sub-tile.

Many skills (most notably curses and auras) apply effects within a radius. Skill descriptions specify radius in yards, while internally it is specified in sub-tiles: each sub-tile is a 2/3 yard by 2/3 yard (2 foot by 2 foot) square, although due to the game's isometric graphics these are rendered as rhomboids.

Radial effects apply to any applicable unit centered over sub-tiles within displayed radius; if missiles spawn within radius, effects apply to target when it collides with missile.

Radius often increases with skill level, but this is not true of the following:

Yards Skill Effect 02 Poison Explosion Cloud radius Immolation Arrow Pyre radius Tornado Periodic damage radius Blades of Ice Freeze length radius 02 2/3 Fists of Fire Explosion and pyre radius Fire Ball Explosion radius Terror Radius Glacial Spike Explosion radius Immolation Arrow Explosion radius Mind Blast Radius 03 1/3 Fire Blast Explosion radius Exploding Arrow Explosion radius Freezing Arrow Explosion radius 04 Dragon Tail Explosion radius Meteor Explosion and pyre radius Decrepify Radius Blades of Ice Cold damage and length radius Phoenix Strike Explosion and pyre radius 04 2/3 Molten Boulder Explosion radius Iron Maiden Radius Blizzard Radius

Yards Skill Effect 05 1/3 Phoenix Strike Lightning jump radius 06 Attract Radius Hurricane Radius 06 2/3 Carrion Vine Radius Solar Creeper Radius 10 Guided Arrow Search radius Bone Spirit Search radius 10 2/3 Redemption Radius 11 1/3 Thunder Storm Search radius Armageddon Radius 13 1/3 Inner Sight Radius Slow Missiles Radius Chain Lightning Search radius Lightning Strike Search radius Fist of the Heavens Holy bolt search radius Conviction Radius 16 2/3 Telekinesis Target radius 18 Dragon Flight Attack range 20 Cloak of Shadows Radius

Since a sub-tile is a 2/3 yard by 2/3 yard square (2 feet by 2 feet), the hypotenuse of the right-angled triangles created by bisecting that square from opposite corners is the square root of 8 (2² + 2²) in feet, or ~2.83 feet. Horizontally this distance equals 32 pixels, but vertically this distance equals just 16 pixels, resulting in the following:

Resolution	Visible Area
	Pixels	Yards
640 x 480	640 x 433	18.86 x 25.51
800 x 600	800 x 553	23.57 x 32.59

If it seems counter-intuitive that vertical distance in yards should be greater than horizontal distance (since it's fewer pixels in length), take another look at the radius image above: distance from the center to the side of the screen is ~12 yards, while distance to the top is ~18 yards.