Flat

Flag:	Flat
File(s):	art(md).ini
Values:	Boolean values: yes or no, true or false, 1 or 0
Default:	no
Applicable to:	BuildingTypes,Animations,Image

States if this building+animation+Image lays flat on the ground. This flag helps the game's drawing logic in determining layers and where to draw it.
For animations, this flag also moves the animation 3 pixels up on the Y-axis, and has code for disabling the animation's shadow (in TS animation shadows don't work anyway).

The attack height (the height set by the FLH tag) affects the Flat tag if the H value (from FLH) is a negative value that will affect the height of the animation. The more negative The animation will be much lower (only H=-1 to H=-9 is supported. Values ​​greater than 9 will Make the animation disappear and heard only the sound)
File:H=-9.png

H=-9

The Tiled=yes tag destroys changes made to H values.
tag YDrawOffset can compensate for changed H values The value inside the YDrawOffset tag must be negative equal to the negative H value. Example: H=-9 YDrawOffset=-9

Note

"and has code for disabling the animation's shadow (in TS animation shadows don't work anyway)"

• In fact, the shadow logic on this tag still works. The actual shadow color will not work. But if you try adding other colors to the shadows. Shadow colors will work as normal.
  File:Color of Shadow.pngFile:Color of Shadow1.gif
  
• The Flat tag has side effects. When used with large animations or animations that are too tall
  File:Side effects of tag Flat.png
  
• Shadows of images defined in the Projectile section will be displayed normally.
  File:Flat on Image (Projectile).png
  

Bugs/Side-Effects/Unexpected Limitations If Projectile has Image=Voxel x any Then Voxel x have Flat=true in the Art.ini or Artmd.ini section will cause Voxel to not work efficiently
According to the video below
https://www.youtube.com/watch?v=bwB6BhmGX6g