Image

Flag:	Image
File(s):	Rules(md).ini, Art(md).ini
Values:	Strings (References to art(md).ini sections) or unsigned integers
Special Values:	None
Default:	same as section name
Applicable to:	Depending on the file: Rules(md).ini InfantryTypes, VehicleTypes, AircraftTypes, BuildingTypes, Projectiles, ParticleSystems, Particles, OverlayTypes, Tiberiums, VoxelAnims Art(md).ini Animations

This flag has several meanings:

On Template:TTL

Template:NeedTesting

The comments say

;image to use [1=small, 2=large, 3=vine]

, but little more is known.

On all other objects

Specifies the section from art(md).ini contains this object's graphical representation parameters such as cameos, firing offsets, and the like. (See also How The Engine Uses Files.)

Note: This flag does not work on InfantryTypes, VehicleTypes and most likely AircraftTypes and BuildingTypes in art(md).ini sections. This is evident by looking at the following code snippets from unmodded artmd.ini:

[CAML]
Image=JOSH

[BFRT]
Image=SREF