Available in version 43 and later. (for new IRPL commands)
SetSpriteLayer(<-spriteUID <-layer)
Sets the render sort layer for the sprite. Sprites are rendered based on their layer and then their order within a layer.
Possible layers are:
0: Sectors. This is the layer the sand is rendered in.
1: Lower. This is a unit layer below the default.
2: Default. The normal and default layer for sprites and units.
3: FOW. The Fog of War layer.
#REnder behind the sand SetSpriteLayer(<-mySprite 0) SetSpriteOrder(<-mySprite -1)